chore(deps): update dependency pymdown-extensions to v10.18 (#2155)

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)
| `==10.17.2` -> `==10.18` |
![age](https://developer.mend.io/api/mc/badges/age/pypi/pymdown-extensions/10.18?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/pymdown-extensions/10.17.2/10.18?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>

###
[`v10.18`](https://redirect.github.com/facelessuser/pymdown-extensions/releases/tag/10.18)

[Compare
Source](https://redirect.github.com/facelessuser/pymdown-extensions/compare/10.17.2...10.18)

#### 10.18

- **NEW**: Critic: `view` mode has been deprecated. To avoid warnings or
future issues, explicitly set `mode` to
either `accept` or `reject`. In the future, the new default will be
`accept` and the `view` mode will be removed
  entirely.
- **FIX**: Block Admonition: `important` should have always been
available as a default.

</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==10.17.2
+pymdown-extensions==10.18