Bump pillow from 11.1.0 to 11.2.1 (#12234)

Bumps [pillow](https://github.com/python-pillow/Pillow) from 11.1.0 to 11.2.1.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@11.1.0...11.2.1)

---
updated-dependencies:
- dependency-name: pillow
  dependency-version: 11.2.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -30,7 +30,7 @@ PyGithub==1.58.2
 lxml==5.3.2
 Markdown==3.8
 openpyxl==3.1.5
-Pillow==11.1.0  # required by django-imagekit
+Pillow==11.2.1  # required by django-imagekit
 psycopg[c]==3.2.6
 cryptography==44.0.2
 python-dateutil==2.9.0.post0