🌱 Bump mkdocs from 1.5.2 to 1.5.3 (#622)

Bumps [mkdocs](https://github.com/mkdocs/mkdocs) from 1.5.2 to 1.5.3.
- [Release notes](https://github.com/mkdocs/mkdocs/releases)
- [Commits](mkdocs/mkdocs@1.5.2...1.5.3)

---
updated-dependencies:
- dependency-name: mkdocs
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/requirements.txt

@@ -13,7 +13,7 @@ Markdown==3.5.2
 markdown2==2.4.12
 MarkupSafe==2.1.3
 mergedeep==1.3.4
-mkdocs==1.5.2
+mkdocs==1.5.3
 mkdocs-material==9.2.3
 mkdocs-material-extensions==1.3.1
 packaging==23.1