Bump the python-security group across 1 directory with 2 updates

Bumps the python-security group with 2 updates in the / directory: [pillow](https://github.com/python-pillow/Pillow) and [certifi](https://github.com/certifi/python-certifi).


Updates `pillow` from 12.3.0 to 13.0.0
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@12.3.0...13.0.0)

Updates `certifi` from 2025.8.3 to 2026.10.19
- [Commits](certifi/python-certifi@2025.08.03...2026.10.19)

---
updated-dependencies:
- dependency-name: pillow
  dependency-version: 13.0.0
  dependency-type: direct:development
  dependency-group: python-security
- dependency-name: certifi
  dependency-version: 2026.10.19
  dependency-type: indirect
  dependency-group: python-security
...

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

Author: dependabot[bot]