Bump pytest-mpl from 0.17.0 to 0.18.0 in the actions group

Bumps the actions group with 1 update: [pytest-mpl](https://github.com/matplotlib/pytest-mpl).


Updates `pytest-mpl` from 0.17.0 to 0.18.0
- [Release notes](https://github.com/matplotlib/pytest-mpl/releases)
- [Changelog](https://github.com/matplotlib/pytest-mpl/blob/main/CHANGES.md)
- [Commits](matplotlib/pytest-mpl@v0.17.0...v0.18.0)

---
updated-dependencies:
- dependency-name: pytest-mpl
  dependency-version: 0.18.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: actions
...

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

Author: dependabot[bot]

pyproject.toml

@@ -33,7 +33,7 @@ dependencies = [
 test = [
     "matplotlib==3.10.1",
     "pytest-cov==7.0.0",
-    "pytest-mpl==0.17.0",
+    "pytest-mpl==0.18.0",
     "pytest==8.4.2",
 ]