build: bump the core group with 2 updates (#3241)

* build: bump the core group with 2 updates

Bumps the core group with 2 updates: [matplotlib](https://github.com/matplotlib/matplotlib) and [vtk](https://vtk.org).


Updates `matplotlib` from 3.9.0 to 3.9.1
- [Release notes](https://github.com/matplotlib/matplotlib/releases)
- [Commits](matplotlib/matplotlib@v3.9.0...v3.9.1)

Updates `vtk` from 9.3.0 to 9.3.1

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

Signed-off-by: dependabot[bot] <[email protected]>

* chore: adding changelog file 3241.dependencies.md

---------

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: pyansys-ci-bot <[email protected]>

doc/changelog.d/3241.dependencies.md

@@ -0,0 +1 @@
+build: bump the core group with 2 updates

pyproject.toml

@@ -60,15 +60,15 @@ jupyter = [
 tests = [
     "ansys-dpf-core==0.10.1",
     "autopep8==2.3.1",
-    "matplotlib==3.9.0",
+    "matplotlib==3.9.1",
     "scipy==1.14.0",
     "pandas==2.2.2",
     "pyiges[full]==0.3.1",
     "pytest==8.2.2",
     "pytest-cov==5.0.0",
     "pyvista==0.43.10",
     "pyansys-tools-report==0.7.3",
-    "vtk==9.3.0",
+    "vtk==9.3.1",
     "pytest-rerunfailures==14.0",
     "pytest-pyvista==0.1.9",
     "pytest-memprof<0.3.0",
@@ -83,7 +83,7 @@ doc = [
     "imageio==2.34.2",
     "jupyter_sphinx==0.5.3",
     "jupyterlab>=3.2.8",
-    "matplotlib==3.9.0",
+    "matplotlib==3.9.1",
     "numpydoc==1.7.0",
     "pandas==2.2.2",
     "plotly==5.22.0",
@@ -101,7 +101,7 @@ doc = [
     "sphinxcontrib-websupport==1.2.7",
     "sphinxemoji==0.3.1",
     "sphinx-reredirects==0.1.4",
-    "vtk==9.3.0",
+    "vtk==9.3.1",
 ]
 
 [tool.flit.module]