deps(python): bump pillow from 11.1.0 to 12.1.1

Bumps [pillow](https://github.com/python-pillow/Pillow) from 11.1.0 to 12.1.1.
- [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...12.1.1)

---
updated-dependencies:
- dependency-name: pillow
  dependency-version: 12.1.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

docker/requirements.txt

@@ -23,7 +23,7 @@ pdfminer.six
 # OpenSPP Specific (not in module manifests but required)
 # -----------------------------------------------------------------------------
 # Pin specific versions for Docker builds
-Pillow==11.1.0
+Pillow==12.1.1
 fastapi==0.112.2
 # Note: requests/urllib3 versions constrained by Odoo's requirements.txt