build(deps): bump pillow from 12.2.0 to 12.3.0 in /src/ContentProcessor

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]

src/ContentProcessor/requirements.txt

@@ -25,7 +25,7 @@ numpy==2.4.4
 packaging==26.0
 pandas==3.0.2
 pdf2image==1.17.0
-pillow==12.2.0
+pillow==12.3.0
 pluggy==1.6.0
 poppler-utils==0.1.0
 pycparser==3.0