chore(deps): update dependency pymdown-extensions to v10.16.1 (#2036)

This PR contains the following updates:

| Package | Change | Age | Confidence |
|---|---|---|---|
|
[pymdown-extensions](https://redirect.github.com/facelessuser/pymdown-extensions)
| `==10.16` -> `==10.16.1` |
[![age](https://developer.mend.io/api/mc/badges/age/pypi/pymdown-extensions/10.16.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/pymdown-extensions/10.16/10.16.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

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---

### Release Notes

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

###
[`v10.16.1`](https://redirect.github.com/facelessuser/pymdown-extensions/releases/tag/10.16.1):
10.6.1

[Compare
Source](https://redirect.github.com/facelessuser/pymdown-extensions/compare/10.16...10.16.1)

#### 10.16.1

- **FIX**: Inefficient regular expression pattern for figure caption
numbers.

</details>

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docs/requirements.txt

@@ -2,4 +2,4 @@ mkdocs==1.6.1
 mkdocs-material==9.6.15
 mkdocs-material-extensions==1.3.1
 mkdocs-video==1.5.0
-pymdown-extensions==10.16
+pymdown-extensions==10.16.1