Update dependency mkdocs-material to v9.5.20 (#1377)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [mkdocs-material](https://togithub.com/squidfunk/mkdocs-material)
([changelog](https://squidfunk.github.io/mkdocs-material/changelog/)) |
patch | `==9.5.19` -> `==9.5.20` |

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### Release Notes

<details>
<summary>squidfunk/mkdocs-material (mkdocs-material)</summary>

###
[`v9.5.20`](https://togithub.com/squidfunk/mkdocs-material/releases/tag/9.5.20):
mkdocs-material-9.5.20

[Compare
Source](https://togithub.com/squidfunk/mkdocs-material/compare/9.5.19...9.5.20)

-   Fixed deprecation warning in privacy plugin (9.5.19 regression)
- Fixed
[#&#8203;7119](https://togithub.com/squidfunk/mkdocs-material/issues/7119):
Tags plugin emits deprecation warning (9.5.19 regression)
- Fixed
[#&#8203;7118](https://togithub.com/squidfunk/mkdocs-material/issues/7118):
Social plugin crashes if fonts are disabled (9.5.19 regression)
- Fixed
[#&#8203;7085](https://togithub.com/squidfunk/mkdocs-material/issues/7085):
Social plugin crashes on Windows when downloading fonts

</details>

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.github/workflows/mkdocs-requirements.txt

@@ -7,7 +7,7 @@ Markdown==3.6
 MarkupSafe==2.1.5
 mkdocs==1.6.0
 mkdocs-macros-plugin==1.0.5
-mkdocs-material==9.5.19
+mkdocs-material==9.5.20
 mkdocs-material-extensions==1.3.1
 Pygments==2.17.2
 pymdown-extensions==10.8.1