Bump pillow from 10.0.1 to 10.2.0 in /docs

Bumps [pillow](https://github.com/python-pillow/Pillow) from 10.0.1 to 10.2.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@10.0.1...10.2.0)

---
updated-dependencies:
- dependency-name: pillow
  dependency-type: indirect
...

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

docs/requirements.txt

@@ -40,7 +40,7 @@ packaging==23.1
     # via
     #   matplotlib
     #   sphinx
-pillow==10.0.1
+pillow==10.2.0
     # via matplotlib
 pygments==2.15.1
     # via sphinx