build(deps): bump pillow from 12.2.0 to 12.3.0 in /tools/pynuttx

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](https://github.com/python-pillow/Pillow/compare/12.2.0...12.3.0)

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

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

tools/pynuttx/requirements.txt

@@ -6,7 +6,7 @@ kiwisolver==1.4.7
 matplotlib==3.9.2
 numpy==2.1.2
 packaging==24.1
-pillow==12.2.0
+pillow==12.3.0
 pyelftools==0.31
 pyparsing==3.2.0
 python-dateutil==2.9.0.post0