Bump the python-packages group in /docs with 2 updates

Bumps the python-packages group in /docs with 2 updates: [markdown](https://github.com/Python-Markdown/markdown) and [mkdocs-material](https://github.com/squidfunk/mkdocs-material).


Updates `markdown` from 3.5.2 to 3.6
- [Release notes](https://github.com/Python-Markdown/markdown/releases)
- [Changelog](https://github.com/Python-Markdown/markdown/blob/master/docs/changelog.md)
- [Commits](Python-Markdown/markdown@3.5.2...3.6)

Updates `mkdocs-material` from 9.5.13 to 9.5.15
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](squidfunk/mkdocs-material@9.5.13...9.5.15)

---
updated-dependencies:
- dependency-name: markdown
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: python-packages
- dependency-name: mkdocs-material
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: python-packages
...

Signed-off-by: dependabot[bot] <support@github.com>

docs/requirements.txt

@@ -6,11 +6,11 @@ colorama==0.4.6
 ghp-import==2.1.0
 idna==3.6
 Jinja2==3.1.3
-Markdown==3.5.2
+Markdown==3.6
 MarkupSafe==2.1.5
 mergedeep==1.3.4
 mkdocs==1.5.3
-mkdocs-material==9.5.13
+mkdocs-material==9.5.15
 mkdocs-material-extensions==1.3.1
 packaging==24.0
 paginate==0.5.6