build: bump the core group with 2 updates

Bumps the core group with 2 updates: [ansys-tools-visualization-interface](https://github.com/ansys/ansys-tools-visualization-interface) and [vtk](https://vtk.org).


Updates `ansys-tools-visualization-interface` from 0.5.0 to 0.6.0
- [Release notes](https://github.com/ansys/ansys-tools-visualization-interface/releases)
- [Changelog](https://github.com/ansys/ansys-tools-visualization-interface/blob/v0.6.0/CHANGELOG.md)
- [Commits](ansys/ansys-tools-visualization-interface@v0.5.0...v0.6.0)

Updates `vtk` from 9.3.1 to 9.4.0

---
updated-dependencies:
- dependency-name: ansys-tools-visualization-interface
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: core
- dependency-name: vtk
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: core
...

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

pyproject.toml

@@ -55,7 +55,7 @@ jupyter = [
 
 tests = [
     "ansys-dpf-core==0.10.1",
-    "ansys-tools-visualization-interface==0.5.0",
+    "ansys-tools-visualization-interface==0.6.0",
     "autopep8==2.3.1",
     "matplotlib==3.9.2",
     "pandas==2.2.3",
@@ -69,13 +69,13 @@ tests = [
     "pytest-rerunfailures==15.0",
     "pytest==8.3.3",
     "scipy==1.14.1",
-    "vtk==9.3.1",
+    "vtk==9.4.0",
 ]
 doc = [
     "ansys-dpf-core==0.10.1",
     "ansys-mapdl-reader==0.54.2",
     "ansys-sphinx-theme==1.2.2",
-    "ansys-tools-visualization-interface==0.5.0",
+    "ansys-tools-visualization-interface==0.6.0",
     "grpcio==1.68.0",
     "imageio-ffmpeg==0.5.1",
     "imageio==2.36.1",
@@ -101,7 +101,7 @@ doc = [
     "sphinx==8.1.3",
     "sphinxcontrib-websupport==2.0.0",
     "sphinxemoji==0.3.1",
-    "vtk==9.3.1",
+    "vtk==9.4.0",
 ]
 
 [tool.flit.module]