Update dependency mkdocs-material to v9.5.20 (#341)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [mkdocs-material](https://togithub.com/squidfunk/mkdocs-material)
([changelog](https://squidfunk.github.io/mkdocs-material/changelog/)) |
`9.5.19` -> `9.5.20` |
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|
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|
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|
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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

-   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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