docs: bump pillow from 11.0.0 to 12.2.0 in /docs (#11)

Bumps [pillow](https://github.com/python-pillow/Pillow) from 11.0.0 to 12.2.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@11.0.0...12.2.0)

---
updated-dependencies:
- dependency-name: pillow
  dependency-version: 12.2.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

docs/requirements.txt

@@ -1,5 +1,5 @@
 mkdocs==1.6.1
 mkdocs-material==9.7.6
 pymdown-extensions==10.12
-pillow==11.0.0
+pillow==12.2.0
 cairosvg==2.9.0