chore(deps): bump urllib3 from 2.2.1 to 2.2.2 in /docs (#1264)

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.2.1 to 2.2.2.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/urllib3/urllib3/releases">urllib3's
releases</a>.</em></p>
<blockquote>
<h2>2.2.2</h2>
<h2>🚀 urllib3 is fundraising for HTTP/2 support</h2>
<p><a
href="https://sethmlarson.dev/urllib3-is-fundraising-for-http2-support">urllib3
is raising ~$40,000 USD</a> to release HTTP/2 support and ensure
long-term sustainable maintenance of the project after a sharp decline
in financial support for 2023. If your company or organization uses
Python and would benefit from HTTP/2 support in Requests, pip, cloud
SDKs, and thousands of other projects <a
href="https://opencollective.com/urllib3">please consider contributing
financially</a> to ensure HTTP/2 support is developed sustainably and
maintained for the long-haul.</p>
<p>Thank you for your support.</p>
<h2>Changes</h2>
<ul>
<li>Added the <code>Proxy-Authorization</code> header to the list of
headers to strip from requests when redirecting to a different host. As
before, different headers can be set via
<code>Retry.remove_headers_on_redirect</code>.</li>
<li>Allowed passing negative integers as <code>amt</code> to read
methods of <code>http.client.HTTPResponse</code> as an alternative to
<code>None</code>. (<a
href="https://redirect.github.com/urllib3/urllib3/issues/3122">#3122</a>)</li>
<li>Fixed return types representing copying actions to use
<code>typing.Self</code>. (<a
href="https://redirect.github.com/urllib3/urllib3/issues/3363">#3363</a>)</li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/urllib3/urllib3/compare/2.2.1...2.2.2">https://github.com/urllib3/urllib3/compare/2.2.1...2.2.2</a></p>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/urllib3/urllib3/blob/main/CHANGES.rst">urllib3's
changelog</a>.</em></p>
<blockquote>
<h1>2.2.2 (2024-06-17)</h1>
<ul>
<li>Added the <code>Proxy-Authorization</code> header to the list of
headers to strip from requests when redirecting to a different host. As
before, different headers can be set via
<code>Retry.remove_headers_on_redirect</code>.</li>
<li>Allowed passing negative integers as <code>amt</code> to read
methods of <code>http.client.HTTPResponse</code> as an alternative to
<code>None</code>.
(<code>[#3122](urllib3/urllib3#3122)
&lt;https://github.com/urllib3/urllib3/issues/3122&gt;</code>__)</li>
<li>Fixed return types representing copying actions to use
<code>typing.Self</code>.
(<code>[#3363](urllib3/urllib3#3363)
&lt;https://github.com/urllib3/urllib3/issues/3363&gt;</code>__)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/urllib3/urllib3/commit/27e2a5c5a7ab6a517252cc8dcef3ffa6ffb8f61a"><code>27e2a5c</code></a>
Release 2.2.2 (<a
href="https://redirect.github.com/urllib3/urllib3/issues/3406">#3406</a>)</li>
<li><a
href="https://github.com/urllib3/urllib3/commit/accff72ecc2f6cf5a76d9570198a93ac7c90270e"><code>accff72</code></a>
Merge pull request from GHSA-34jh-p97f-mpxf</li>
<li><a
href="https://github.com/urllib3/urllib3/commit/34be4a57e59eb7365bcc37d52e9f8271b5b8d0d3"><code>34be4a5</code></a>
Pin CFFI to a new release candidate instead of a Git commit (<a
href="https://redirect.github.com/urllib3/urllib3/issues/3398">#3398</a>)</li>
<li><a
href="https://github.com/urllib3/urllib3/commit/da410581b6b3df73da976b5ce5eb20a4bd030437"><code>da41058</code></a>
Bump browser-actions/setup-chrome from 1.6.0 to 1.7.1 (<a
href="https://redirect.github.com/urllib3/urllib3/issues/3399">#3399</a>)</li>
<li><a
href="https://github.com/urllib3/urllib3/commit/b07a669bd970d69847801148286b726f0570b625"><code>b07a669</code></a>
Bump github/codeql-action from 2.13.4 to 3.25.6 (<a
href="https://redirect.github.com/urllib3/urllib3/issues/3396">#3396</a>)</li>
<li><a
href="https://github.com/urllib3/urllib3/commit/b8589ec9f8c4da91511e601b632ac06af7e7c10e"><code>b8589ec</code></a>
Measure coverage with v4 of artifact actions (<a
href="https://redirect.github.com/urllib3/urllib3/issues/3394">#3394</a>)</li>
<li><a
href="https://github.com/urllib3/urllib3/commit/f3bdc5585111429e22c81b5fb26c3ec164d98b81"><code>f3bdc55</code></a>
Allow triggering CI manually (<a
href="https://redirect.github.com/urllib3/urllib3/issues/3391">#3391</a>)</li>
<li><a
href="https://github.com/urllib3/urllib3/commit/52392654b30183129cf3ec06010306f517d9c146"><code>5239265</code></a>
Fix HTTP version in debug log (<a
href="https://redirect.github.com/urllib3/urllib3/issues/3316">#3316</a>)</li>
<li><a
href="https://github.com/urllib3/urllib3/commit/b34619f94ece0c40e691a5aaf1304953d88089de"><code>b34619f</code></a>
Bump actions/checkout to 4.1.4 (<a
href="https://redirect.github.com/urllib3/urllib3/issues/3387">#3387</a>)</li>
<li><a
href="https://github.com/urllib3/urllib3/commit/9961d14de7c920091d42d42ed76d5d479b80064d"><code>9961d14</code></a>
Bump browser-actions/setup-chrome from 1.5.0 to 1.6.0 (<a
href="https://redirect.github.com/urllib3/urllib3/issues/3386">#3386</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/urllib3/urllib3/compare/2.2.1...2.2.2">compare
view</a></li>
</ul>
</details>
<br />


[![Dependabot compatibility
score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=urllib3&package-manager=pip&previous-version=2.2.1&new-version=2.2.2)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

Dependabot will resolve any conflicts with this PR as long as you don't
alter it yourself. You can also trigger a rebase manually by commenting
`@dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits
that have been made to it
- `@dependabot merge` will merge this PR after your CI passes on it
- `@dependabot squash and merge` will squash and merge this PR after
your CI passes on it
- `@dependabot cancel merge` will cancel a previously requested merge
and block automerging
- `@dependabot reopen` will reopen this PR if it is closed
- `@dependabot close` will close this PR and stop Dependabot recreating
it. You can achieve the same result by closing it manually
- `@dependabot show <dependency name> ignore conditions` will show all
of the ignore conditions of the specified dependency
- `@dependabot ignore this major version` will close this PR and stop
Dependabot creating any more for this major version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop
Dependabot creating any more for this minor version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop
Dependabot creating any more for this dependency (unless you reopen the
PR or upgrade to it yourself)
You can disable automated security fix PRs for this repo from the
[Security Alerts
page](https://github.com/canonical/operator/network/alerts).

</details>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/requirements.txt

@@ -135,7 +135,7 @@ tornado==6.4.1
     # via livereload
 uc-micro-py==1.0.3
     # via linkify-it-py
-urllib3==2.2.1
+urllib3==2.2.2
     # via requests
 wcmatch==8.5.1
     # via pyspelling