Bump the docs group with 6 updates

Updates the requirements on [markdown](https://github.com/Python-Markdown/markdown), [pygments](https://github.com/pygments/pygments), [babel](https://github.com/python-babel/babel), [backrefs](https://github.com/facelessuser/backrefs), [requests](https://github.com/psf/requests) and [click](https://github.com/pallets/click) to permit the latest version.

Updates `markdown` to 3.10.3
- [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@3.2...3.10.3)

Updates `pygments` to 2.21.0
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.16.0...2.21.0)

Updates `babel` to 2.18.0
- [Release notes](https://github.com/python-babel/babel/releases)
- [Changelog](https://github.com/python-babel/babel/blob/master/CHANGES.rst)
- [Commits](python-babel/babel@v2.10.0...v2.18.0)

Updates `backrefs` to 8.0
- [Release notes](https://github.com/facelessuser/backrefs/releases)
- [Commits](facelessuser/backrefs@5.8...8.0)

Updates `requests` to 2.34.2
- [Release notes](https://github.com/psf/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/main/HISTORY.md)
- [Commits](psf/requests@v2.26.0...v2.34.2)

Updates `click` to 8.4.2
- [Release notes](https://github.com/pallets/click/releases)
- [Changelog](https://github.com/pallets/click/blob/main/CHANGES.md)
- [Commits](pallets/click@0.1...8.4.2)

---
updated-dependencies:
- dependency-name: markdown
  dependency-version: 3.10.3
  dependency-type: direct:production
  dependency-group: docs
- dependency-name: pygments
  dependency-version: 2.21.0
  dependency-type: direct:production
  dependency-group: docs
- dependency-name: babel
  dependency-version: 2.18.0
  dependency-type: direct:production
  dependency-group: docs
- dependency-name: backrefs
  dependency-version: '8.0'
  dependency-type: direct:production
  dependency-group: docs
- dependency-name: requests
  dependency-version: 2.34.2
  dependency-type: direct:production
  dependency-group: docs
- dependency-name: click
  dependency-version: 8.4.2
  dependency-type: direct:production
  dependency-group: docs
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,19 +1,19 @@
 # Requirements for core
 jinja2~=3.1
-markdown~=3.2
+markdown~=3.10
 mkdocs~=1.6
 mkdocs-material
 mkdocs-material-extensions~=1.3
-pygments~=2.16
+pygments~=2.21
 pymdown-extensions~=11.0.2
 
 # Requirements for plugins
-babel~=2.10
+babel~=2.18
 colorama~=0.4
 paginate~=0.5
-backrefs~=5.7.post1
-requests~=2.26
+backrefs~=8.0.0
+requests~=2.34
 
 # Temporarily pin click until this is resolved in MkDocs, see
 # https://github.com/mkdocs/mkdocs/issues/4014#issuecomment-3146508306
-click<8.2.2
+click<8.4.3