Bump pillow from 11.1.0 to 11.2.1

Bumps [pillow](https://github.com/python-pillow/Pillow) from 11.1.0 to 11.2.1.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@11.1.0...11.2.1)

---
updated-dependencies:
- dependency-name: pillow
  dependency-version: 11.2.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements_test.txt

@@ -7,7 +7,7 @@ scipy==1.10.1
 matplotlib==3.9.4
 scikit-learn==1.6.1
 six==1.17.0
-Pillow==11.1.0
+Pillow==11.2.1
 tqdm==4.67.1
 statsmodels==0.14.2
 pydub==0.25.1