Bump pillow from 10.3.0 to 12.1.1 in /samples/python

Bumps [pillow](https://github.com/python-pillow/Pillow) from 10.3.0 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@10.3.0...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]

samples/python/requirements.txt

@@ -1,6 +1,6 @@
 matplotlib==3.8.2
 numpy==1.26.3
 pyopencl==2023.1.4
-pillow==10.3.0
+pillow==12.1.1
 
 jupyterlab==4.4.8