Bump pillow from 11.1.0 to 11.2.1

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
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,4 +1,4 @@
 imageio==2.37.0
 mpi4py==4.0.3
 numpy==2.2.4
-pillow==11.1.0
+pillow==11.2.1