build(deps): bump vtk from 9.4.0 to 9.4.2

Bumps [vtk](https://vtk.org) from 9.4.0 to 9.4.2.

---
updated-dependencies:
- dependency-name: vtk
  dependency-version: 9.4.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pyproject.toml

@@ -67,7 +67,7 @@ test = [
 ]
 test-extra = [
     "pyvista==0.44.1",
-    "vtk==9.4.0",
+    "vtk==9.4.2",
     "ansys-dpf-core==0.13.8",
 ]
 doc = [