Bump matplotlib from 3.10.7 to 3.10.8 in the python-updates group

Bumps the python-updates group with 1 update: [matplotlib](https://github.com/matplotlib/matplotlib).


Updates `matplotlib` from 3.10.7 to 3.10.8
- [Release notes](https://github.com/matplotlib/matplotlib/releases)
- [Commits](matplotlib/matplotlib@v3.10.7...v3.10.8)

---
updated-dependencies:
- dependency-name: matplotlib
  dependency-version: 3.10.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: python-updates
...

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

Author: dependabot[bot]

install/testing_requirements.txt

@@ -6,6 +6,6 @@ pytest-timeout==2.4.0
 mock==5.2.0
 python-dateutil==2.9.0.post0
 anyio==4.12.0
-matplotlib==3.10.7
+matplotlib==3.10.8
 mpmath==1.3.0
 rich==14.2.0