Bump pillow from 12.1.1 to 12.2.0 in /docs/src/doc (#999)

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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Co-authored-by: JP <jonathan.percival@smilecdr.com>

Author: dependabot[bot]

docs/src/doc/requirements.txt

@@ -1,2 +1,2 @@
 mkdocs-material == 9.6.2
-pillow == 12.1.1
+pillow == 12.2.0