Bump pip from 22.0.3 to 22.0.4 (PR #4073)

Bumps [pip](https://github.com/pypa/pip) from 22.0.3 to 22.0.4.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/pypa/pip/blob/main/NEWS.rst">pip's changelog</a>.</em></p>
<blockquote>
<h1>22.0.4 (2022-03-06)</h1>
<h2>Deprecations and Removals</h2>
<ul>
<li>Drop the doctype check, that presented a warning for index pages that use non-compliant HTML 5. (<code>[#10903](pypa/pip#10903) &lt;https://github.com/pypa/pip/issues/10903&gt;</code>_)</li>
</ul>
<h2>Vendored Libraries</h2>
<ul>
<li>Downgrade distlib to 0.3.3.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/pypa/pip/commit/29ddc93ee8f33f4e1c7402a16b32bdf5b61c7369"><code>29ddc93</code></a> Bump for release</li>
<li><a href="https://github.com/pypa/pip/commit/c14946891cf4b6adb6c33a18c65dc4627fc80aa4"><code>c149468</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/pypa/pip/issues/10943">#10943</a> from pradyunsg/downgrade-distlib</li>
<li><a href="https://github.com/pypa/pip/commit/6c17e27772f8e3d5d4e8732dc8c9e6e516a6575e"><code>6c17e27</code></a> Drop the doctype check (<a href="https://github-redirect.dependabot.com/pypa/pip/issues/10906">#10906</a>)</li>
<li>See full diff in <a href="https://github.com/pypa/pip/compare/22.0.3...22.0.4">compare view</a></li>
</ul>
</details>
<br />

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changelogs/unreleased/4073-dependabot.yml

@@ -0,0 +1,5 @@
+change-type: patch
+description: Bump pip from 22.0.3 to 22.0.4
+destination-branches:
+- iso5
+sections: {}

requirements.txt

@@ -12,7 +12,7 @@ jinja2==3.1.1
 more-itertools==8.12.0
 netifaces==0.11.0
 packaging==21.3
-pip==22.0.3
+pip==22.0.4
 ply==3.11
 pydantic==1.9.0
 pyformance==0.4