Bump pillow from 12.1.1 to 12.2.0 in /clients/python

Bumps [pillow](https://github.com/python-pillow/Pillow) from 12.1.1 to 12.2.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@12.1.1...12.2.0)

---
updated-dependencies:
- dependency-name: pillow
  dependency-version: 12.2.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

clients/python/Pipfile

@@ -15,7 +15,7 @@ six = "1.16.0"
 termcolor = "2.3.0"
 pytype = "2023.6.2"
 typing-extensions = "4.6.3"
-pillow = "12.1.1"
+pillow = "12.2.0"
 
 [dev-packages]
 yapf = "0.40.1"