Bump pillow from 11.1.0 to 11.3.0

Bumps [pillow](https://github.com/python-pillow/Pillow) from 11.1.0 to 11.3.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](https://github.com/python-pillow/Pillow/compare/11.1.0...11.3.0)

---
updated-dependencies:
- dependency-name: pillow
  dependency-version: 11.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -14,7 +14,7 @@ bleach==6.2.0
 gunicorn==23.0.0
 lxml==5.3.1
 Markdown==3.7
-Pillow==11.1.0
+Pillow==11.3.0
 psycopg2-binary==2.9.10
 python-dotenv==1.0.0
 requests==2.32.4