Update pillow requirement from >=12.2.0 to >=12.3.0

Updates the requirements on [pillow](https://github.com/python-pillow/Pillow) to permit the latest version.
- [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
...

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

Author: dependabot[bot]

requirements.txt

@@ -38,7 +38,7 @@ numpy>=2.5.1; python_version >= '3.12'
 packaging>=26.2
 pandas>=1.4.0, <3.0.0
 panel>=1.9.3
-Pillow>=12.2.0  # (sec vuln) transitive dependency via bokeh
+Pillow>=12.3.0  # (sec vuln) transitive dependency via bokeh
 pydantic>=1.8.0, <3.0.0
 pygments>=2.20.0
 pyjwt>=2.13.0