Bump pyvista from 0.44.1 to 0.44.2 in /requirements (#1939)

Bumps [pyvista](https://github.com/pyvista/pyvista) from 0.44.1 to 0.44.2.
- [Release notes](https://github.com/pyvista/pyvista/releases)
- [Commits](pyvista/pyvista@v0.44.1...v0.44.2)

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

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

Author: dependabot[bot]

requirements/requirements_docs.txt

@@ -6,7 +6,7 @@ imageio-ffmpeg==0.5.1
 nbsphinx==0.9.5
 pypandoc==1.14
 pytest-sphinx==0.6.3
-pyvista==0.44.1
+pyvista==0.44.2
 sphinx==7.1.0
 sphinx-copybutton==0.5.2
 sphinx-gallery==0.18.0

requirements/requirements_test.txt

@@ -6,5 +6,5 @@ pytest==8.3.3
 pytest-cov==5.0.0
 pytest-order==1.3.0
 pytest-rerunfailures==15.0
-pyvista==0.44.1
+pyvista==0.44.2
 vtk==9.3.1