build(deps): Bump pillow from 10.2.0 to 10.3.0 in /docs

Bumps [pillow](https://github.com/python-pillow/Pillow) from 10.2.0 to 10.3.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@10.2.0...10.3.0)

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

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

docs/requirements.txt

@@ -1,6 +1,6 @@
 sphinx==7.2.6
 sphinx-rtd-theme==1.3.0
-pillow==10.2.0
+pillow==10.3.0
 mock==5.1.0
 commonmark==0.9.1
 recommonmark==0.7.1