build: bump the core group with 2 updates

Bumps the core group with 2 updates: [matplotlib](https://github.com/matplotlib/matplotlib) and [ansys-sphinx-theme](https://github.com/ansys/ansys-sphinx-theme).


Updates `matplotlib` from 3.9.1.post1 to 3.9.2
- [Release notes](https://github.com/matplotlib/matplotlib/releases)
- [Commits](matplotlib/matplotlib@v3.9.1.post1...v3.9.2)

Updates `ansys-sphinx-theme` from 1.0.2 to 1.0.4
- [Release notes](https://github.com/ansys/ansys-sphinx-theme/releases)
- [Commits](ansys/ansys-sphinx-theme@v1.0.2...v1.0.4)

---
updated-dependencies:
- dependency-name: matplotlib
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: core
- dependency-name: ansys-sphinx-theme
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: core
...

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

pyproject.toml

@@ -60,7 +60,7 @@ tests = [
     "ansys-dpf-core==0.10.1",
     "ansys-tools-visualization-interface==0.4.0",
     "autopep8==2.3.1",
-    "matplotlib==3.9.1.post1",
+    "matplotlib==3.9.2",
     "pandas==2.2.2",
     "pyansys-tools-report==0.7.3",
     "pyiges[full]==0.3.1",
@@ -76,13 +76,13 @@ doc = [
     "ansys-dpf-core==0.10.1",
     "ansys-mapdl-reader==0.53.0",
     "ansys-tools-visualization-interface==0.4.0",
-    "ansys-sphinx-theme==1.0.2",
+    "ansys-sphinx-theme==1.0.4",
     "grpcio==1.65.4",
     "imageio-ffmpeg==0.5.1",
     "imageio==2.34.2",
     "jupyter_sphinx==0.5.3",
     "jupyterlab>=3.2.8",
-    "matplotlib==3.9.1.post1",
+    "matplotlib==3.9.2",
     "numpydoc==1.7.0",
     "pandas==2.2.2",
     "plotly==5.23.0",