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

@@ -58,7 +58,7 @@ classifiers = [
 tests = [
     "ansys-dpf-core==0.10.0",
     "autopep8==2.0.4",
-    "matplotlib==3.8.0",
+    "matplotlib==3.8.1",
     "scipy==1.10.1; python_version < '3.9'", # to support python 3.8
     "scipy==1.11.3; python_version > '3.8'",
     "pandas==2.1.2",
@@ -81,7 +81,7 @@ doc = [
     "imageio==2.31.6",
     "jupyter_sphinx==0.4.0",
     "jupyterlab>=3.2.8",
-    "matplotlib==3.8.0",
+    "matplotlib==3.8.1",
     "numpydoc==1.6.0",
     "pandas==2.1.2",
     "plotly==5.18.0",