Bump pillow from 12.1.1 to 12.2.0 in /docs (#471)

Bumps [pillow](https://github.com/python-pillow/Pillow) from 12.1.1 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@12.1.1...12.2.0)

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

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docs/requirements.txt

@@ -6,7 +6,7 @@ pydyf==0.11.0
 mkdocs-pdf-export-plugin==0.5.10
 mkdocs-minify-plugin==0.8.0
 mike>=2.0.0
-Pillow==12.1.1
+Pillow==12.2.0
 mkdocs-git-revision-date-localized-plugin
 mkdocs-redirects>=1.2.1
 jieba>=0.42.1