Bump pillow from 10.2.0 to 10.3.0 in /etc/requirements_dependabot

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>

etc/requirements_dependabot/requirements_tests.txt

@@ -116,7 +116,7 @@ parso==0.8.3
     # via jedi
 pathspec==0.12.1
     # via black
-pillow==10.2.0
+pillow==10.3.0
     # via matplotlib
 platformdirs==4.2.0
     # via black