Bump pillow from 12.0.0 to 12.1.0 (#788)

Bumps [pillow](https://github.com/python-pillow/Pillow) from 12.0.0 to 12.1.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@12.0.0...12.1.0)

---
updated-dependencies:
- dependency-name: pillow
  dependency-version: 12.1.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

doc/requirements.txt

@@ -1,6 +1,6 @@
 click==8.3.1
 entrypoints==0.4
-Pillow==12.0.0
+Pillow==12.1.0
 Sphinx==9.0.4
 furo==2025.12.19
 ipython==9.9.0

requirements.txt

@@ -6,6 +6,6 @@ numpy==1.26.4; python_version < '3.10'
 scipy==1.16.3
 h5netcdf==1.7.3
 h5py==3.15.1
-pillow==12.0.0
+pillow==12.1.0
 loguru==0.7.3
 tqdm==4.67.1