Bump pyvista from 0.43.4 to 0.43.6 (#188)

Bumps [pyvista](https://github.com/pyvista/pyvista) from 0.43.4 to 0.43.6.
- [Release notes](https://github.com/pyvista/pyvista/releases)
- [Commits](pyvista/pyvista@v0.43.4...v0.43.6)

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

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

requirements-doc.txt

@@ -2,7 +2,7 @@ jupyter_sphinx==0.5.3
 jupyterlab==4.1.5
 numpydoc==1.7.0
 pydata-sphinx-theme==0.15.2
-pyvista==0.43.4
+pyvista==0.43.6
 sphinx==7.2.6
 sphinx-design==0.5.0
 sphinx-gallery==0.15.0