Bump pillow from 12.2.0 to 12.3.0 in /docker

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]

docker/requirements.txt

@@ -6,7 +6,7 @@ pydantic==2.11.3
 pydantic-settings==2.8.1
 httpx==0.28.1
 python-dotenv==1.2.2
-pillow==12.2.0
+pillow==12.3.0
 python-multipart==0.0.31
 uuid==1.30
 colorama==0.4.6