Bump pillow from 12.2.0 to 12.3.0 in /samples/python (#170)

Bumps [pillow](https://github.com/python-pillow/Pillow) from 12.2.0 to 12.3.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@12.2.0...12.3.0)

---
updated-dependencies:
- dependency-name: pillow
  dependency-version: 12.3.0
  dependency-type: direct:production
...

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samples/python/requirements.txt

@@ -1,6 +1,6 @@
 matplotlib==3.8.2
 numpy==1.26.3
 pyopencl==2023.1.4
-pillow==12.2.0
+pillow==12.3.0
 
 jupyterlab==4.5.9