chore(deps): update dependency pymdown-extensions to v10.20 (#2194)

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
|
[pymdown-extensions](https://redirect.github.com/facelessuser/pymdown-extensions)
| `==10.19.1` → `==10.20` |
![age](https://developer.mend.io/api/mc/badges/age/pypi/pymdown-extensions/10.20?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/pymdown-extensions/10.19.1/10.20?slim=true)
|

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> Some dependencies could not be looked up. Check the Dependency
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---

### Release Notes

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

###
[`v10.20`](https://redirect.github.com/facelessuser/pymdown-extensions/releases/tag/10.20)

[Compare
Source](https://redirect.github.com/facelessuser/pymdown-extensions/compare/10.19.1...10.20)

#### 10.20

- **NEW**: Quotes: New blockquotes extension added that uses a more
modern approach when compared to Python Markdown's
default. Quotes specifically will not group consecutive blockquotes
together in the same lazy fashion that the
default Python Markdown does which follows a more modern trend to how
parsers these days handle block quotes.

In addition, Quotes also provides an optional feature to enable
specifying callouts/alerts in the style used by
  GitHub and Obsidian.

</details>

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docs/requirements.txt

@@ -2,4 +2,4 @@ mkdocs==1.6.1
 mkdocs-material==9.7.1
 mkdocs-material-extensions==1.3.1
 mkdocs-video==1.5.0
-pymdown-extensions==10.19.1
+pymdown-extensions==10.20