Bump vtk from 9.2.5 to 9.2.6

Bumps [vtk](https://vtk.org) from 9.2.5 to 9.2.6.

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

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

Author: dependabot[bot]

pyproject.toml

@@ -40,7 +40,7 @@ tests = [
     "pytest-cov==4.0.0",
     "pytest-rerunfailures==11.1",
     "pyvista==0.37.0",
-    "vtk==9.2.5",
+    "vtk==9.2.6",
 ]
 doc = [
     "Sphinx==5.3.0",
@@ -59,7 +59,7 @@ doc = [
     "sphinx-copybutton==0.5.1",
     "sphinx-notfound-page==0.8.3",
     "sphinx-gallery==0.11.1",
-    "vtk==9.2.5",
+    "vtk==9.2.6",
 ]
 
 [tool.flit.module]