Bump pillow from 11.0.0 to 12.1.1

Bumps [pillow](https://github.com/python-pillow/Pillow) from 11.0.0 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@11.0.0...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

@@ -10,7 +10,7 @@ numpy==2.1.3
 openpyxl==3.1.5
 packaging==24.2
 pandas>=2.0.0
-pillow==11.0.0
+pillow==12.1.1
 ply==3.11
 Pyomo==6.8.2
 pyparsing==3.2.0