build(deps): bump pillow from 11.3.0 to 12.0.0

Bumps [pillow](https://github.com/python-pillow/Pillow) from 11.3.0 to 12.0.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@11.3.0...12.0.0)

---
updated-dependencies:
- dependency-name: pillow
  dependency-version: 12.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

requirements.txt

@@ -17,7 +17,7 @@ django-simple-history==3.10.1
 django-widget-tweaks==1.5.0
 gunicorn==23.0.0
 icalendar==6.3.1
-Pillow==11.3.0
+Pillow==12.0.0
 psycopg[binary,pool]==3.2.11
 python-decouple==3.8
 redis[hiredis]==6.4.0