Update dependency mkdocs-material to v9.6.3 (#1925)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[mkdocs-material](https://github.com/squidfunk/mkdocs-material)
([changelog](https://squidfunk.github.io/mkdocs-material/changelog/)) |
patch | `==9.6.2` -> `==9.6.3` |

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### Release Notes

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

###
[`v9.6.3`](https://github.com/squidfunk/mkdocs-material/releases/tag/9.6.3):
mkdocs-material-9.6.3

[Compare
Source](https://github.com/squidfunk/mkdocs-material/compare/9.6.2...9.6.3)

-   Fixed rendering of arrow heads in Mermaid.js class diagrams
- Fixed
[#&#8203;7960](https://github.com/squidfunk/mkdocs-material/issues/7960):
Tags plugin crashes on numeric metadata titles

</details>

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.github/workflows/mkdocs-requirements.txt

@@ -7,7 +7,7 @@ Markdown==3.7
 MarkupSafe==3.0.2
 mkdocs==1.6.1
 mkdocs-macros-plugin==1.3.7
-mkdocs-material==9.6.2
+mkdocs-material==9.6.3
 mkdocs-material-extensions==1.3.1
 Pygments==2.19.1
 pymdown-extensions==10.14.3