build(deps-dev): bump matplotlib from 3.8.0 to 3.8.1

Bumps [matplotlib](https://github.com/matplotlib/matplotlib) from 3.8.0 to 3.8.1.
- [Release notes](https://github.com/matplotlib/matplotlib/releases)
- [Commits](matplotlib/matplotlib@v3.8.0...v3.8.1)

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

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

pyproject.toml

@@ -33,7 +33,7 @@ dependencies = [
 [project.optional-dependencies]
 tests = [
     "pyvista==0.42.3",
-    "matplotlib==3.8.0",
+    "matplotlib==3.8.1",
     "numpy==1.26.1",
     "pytest==7.4.3",
     "pytest-cov==4.1.0",
@@ -46,7 +46,7 @@ tests = [
 ]
 doc = [
     "recommonmark==0.7.1",
-    "matplotlib==3.8.0",
+    "matplotlib==3.8.1",
     "imageio==2.31.6",
     "imageio-ffmpeg==0.4.9",
     "pyvista==0.42.3",