chore(deps): update docs/requirements.txt (#143)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [mkdocs](https://togithub.com/mkdocs/mkdocs)
([changelog](https://www.mkdocs.org/about/release-notes/)) | `==1.5.1`
-> `==1.5.2` |
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|
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|
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|
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|
|
[pymdown-extensions](https://togithub.com/facelessuser/pymdown-extensions)
| `==10.1` -> `==10.2.1` |
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|
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|

---

### Release Notes

<details>
<summary>mkdocs/mkdocs (mkdocs)</summary>

### [`v1.5.2`](https://togithub.com/mkdocs/mkdocs/releases/tag/1.5.2)

[Compare
Source](https://togithub.com/mkdocs/mkdocs/compare/1.5.1...1.5.2)

- Bugfix (regression in 1.5.0): Restore functionality of
`--no-livereload`.
([#&#8203;3320](https://togithub.com/mkdocs/mkdocs/issues/3320))

- Bugfix (regression in 1.5.0): The new page title detection would
sometimes be unable to drop anchorlinks - fix that.
([#&#8203;3325](https://togithub.com/mkdocs/mkdocs/issues/3325))

- Partly bring back pre-1.5 API: `extra_javascript` items will once
again be mostly strings, and only sometimes `ExtraStringValue` (when the
extra `script` functionality is used).

Plugins should be free to append strings to `config.extra_javascript`,
but when reading the values, they must still make sure to read it as
`str(value)` in case it is an `ExtraScriptValue` item. For querying the
attributes such as `.type` you need to check `isinstance` first. Static
type checking will guide you in that.
([#&#8203;3324](https://togithub.com/mkdocs/mkdocs/issues/3324))

See [commit
log](https://togithub.com/mkdocs/mkdocs/compare/1.5.1...1.5.2).

</details>

<details>
<summary>facelessuser/pymdown-extensions (pymdown-extensions)</summary>

###
[`v10.2.1`](https://togithub.com/facelessuser/pymdown-extensions/releases/tag/10.2.1)

[Compare
Source](https://togithub.com/facelessuser/pymdown-extensions/compare/10.2...10.2.1)

#### 10.2.1

-   **FIX**: Tabbed: Fix regression.

###
[`v10.2`](https://togithub.com/facelessuser/pymdown-extensions/releases/tag/10.2)

[Compare
Source](https://togithub.com/facelessuser/pymdown-extensions/compare/10.1.0...10.2)

#### 10.2

- **NEW**: Highlight: Add new `stripnl` option to configure Pygments'
default handling of stripping leading and
and trailing new lines from code blocks. Mainly affects fenced code
blocks.
- **FIX**: SuperFences: Fix issue where when SuperFences attempts to
test if a placeholder is its own, it can throw
    an exception.

</details>

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docs/requirements.txt

@@ -1,6 +1,6 @@
-mkdocs==1.5.1
+mkdocs==1.5.2
 mkdocs-material
 mkdocstrings[python]==0.22.0
 mkdocs-include-markdown-plugin
 pygments
-pymdown-extensions==10.1
+pymdown-extensions==10.2.1