Bump matplotlib from 3.9.4 to 3.10.0 in /docker/sane-doc-reports

Bumps [matplotlib](https://github.com/matplotlib/matplotlib) from 3.9.4 to 3.10.0.
- [Release notes](https://github.com/matplotlib/matplotlib/releases)
- [Commits](matplotlib/matplotlib@v3.9.4...v3.10.0)

---
updated-dependencies:
- dependency-name: matplotlib
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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