build(deps): bump the patches group in /docs with 4 updates

Bumps the patches group in /docs with 4 updates: [markdown](https://github.com/Python-Markdown/markdown), [platformdirs](https://github.com/tox-dev/platformdirs), [pymdown-extensions](https://github.com/facelessuser/pymdown-extensions) and [zensical](https://github.com/zensical/zensical).


Updates `markdown` from 3.11 to 3.11.1
- [Release notes](https://github.com/Python-Markdown/markdown/releases)
- [Changelog](https://github.com/Python-Markdown/markdown/blob/master/docs/changelog.md)
- [Commits](https://github.com/Python-Markdown/markdown/compare/3.11.0...3.11.1)

Updates `platformdirs` from 4.13.0 to 4.13.4
- [Release notes](https://github.com/tox-dev/platformdirs/releases)
- [Changelog](https://github.com/tox-dev/platformdirs/blob/main/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/platformdirs/compare/4.13.0...4.13.4)

Updates `pymdown-extensions` from 12.2 to 12.3
- [Release notes](https://github.com/facelessuser/pymdown-extensions/releases)
- [Commits](https://github.com/facelessuser/pymdown-extensions/compare/12.2...12.3)

Updates `zensical` from 0.0.69 to 0.0.71
- [Release notes](https://github.com/zensical/zensical/releases)
- [Commits](https://github.com/zensical/zensical/compare/v0.0.69...v0.0.71)

---
updated-dependencies:
- dependency-name: markdown
  dependency-version: 3.11.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: patches
- dependency-name: platformdirs
  dependency-version: 4.13.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: patches
- dependency-name: pymdown-extensions
  dependency-version: '12.3'
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: patches
- dependency-name: zensical
  dependency-version: 0.0.71
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: patches
...

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

docs/requirements.txt

@@ -4,7 +4,7 @@ deepmerge==3.0.1
 ghp-import==2.1.0
 griffe==2.3.2
 Jinja2==3.1.6
-Markdown==3.11
+Markdown==3.11.1
 MarkupSafe==3.0.4
 mergedeep==1.3.4
 mkdocs==1.6.1
@@ -14,12 +14,12 @@ mkdocstrings==1.0.7
 mkdocstrings-python==2.0.9
 packaging==26.3
 pathspec==1.1.1
-platformdirs==4.13.0
+platformdirs==4.13.4
 Pygments==2.21.0
-pymdown-extensions==12.2
+pymdown-extensions==12.3
 python-dateutil==2.9.0.post0
 PyYAML==6.0.3
 pyyaml_env_tag==1.1
 six==1.17.0
 watchdog==6.0.0
-zensical==0.0.69
+zensical==0.0.71