chore(deps): bump pillow from 12.2.0 to 12.3.0

Bumps [pillow](https://github.com/python-pillow/Pillow) from 12.2.0 to 12.3.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@12.2.0...12.3.0)

---
updated-dependencies:
- dependency-name: pillow
  dependency-version: 12.3.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -30,7 +30,7 @@ PyGithub==2.9.1
 lxml==6.1.1
 Markdown==3.10.2
 openpyxl==3.1.5
-Pillow==12.2.0  # required by django-imagekit
+Pillow==12.3.0  # required by django-imagekit
 psycopg[c]==3.3.4
 cryptography==49.0.0
 python-dateutil==2.9.0.post0