Bump pillow from 10.2.0 to 10.3.0 in /src/backend (#6944)

* Bump pillow from 10.2.0 to 10.3.0 in /src/backend

Bumps [pillow](https://github.com/python-pillow/Pillow) from 10.2.0 to 10.3.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@10.2.0...10.3.0)

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

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

* fix req

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Matthias Mair <code@mjmair.com>

src/backend/requirements.txt

@@ -222,7 +222,7 @@ opentelemetry-util-http==0.44b0
 packaging==24.0
     # via gunicorn
 pdf2image==1.17.0
-pillow==10.2.0
+pillow==10.3.0
     # via
     #   django-stdimage
     #   pdf2image