Bump pillow from 12.0.0 to 12.1.1

Bumps [pillow](https://github.com/python-pillow/Pillow) from 12.0.0 to 12.1.1.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@12.0.0...12.1.1)

---
updated-dependencies:
- dependency-name: pillow
  dependency-version: 12.1.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -2,7 +2,7 @@ coverage==7.13.0
 factory-boy==3.3.3
 freezegun==1.5.5
 networkx==3.4.2
-pillow==12.0.0
+pillow==12.1.1
 pydot==3.0.4
 pygments==2.19.2
 pytest-cov==7.0.0