chore(deps): update dependency pymdown-extensions to v10.19 (#2158)

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)
| `==10.18` -> `==10.19` |
![age](https://developer.mend.io/api/mc/badges/age/pypi/pymdown-extensions/10.19?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/pymdown-extensions/10.18/10.19?slim=true)
|

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---

### Release Notes

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

###
[`v10.19`](https://redirect.github.com/facelessuser/pymdown-extensions/releases/tag/10.19)

[Compare
Source](https://redirect.github.com/facelessuser/pymdown-extensions/compare/10.18...10.19)

#### 10.19

- **NEW**: Emoji: Update Twemoji to use Unicode 16.
- **NEW**: Critic: Roll back `view` mode deprecation as some still like
to use it, though further enhancements to this
  mode are not planned.

</details>

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docs/requirements.txt

@@ -2,4 +2,4 @@ mkdocs==1.6.1
 mkdocs-material==9.7.0
 mkdocs-material-extensions==1.3.1
 mkdocs-video==1.5.0
-pymdown-extensions==10.18
+pymdown-extensions==10.19