Bump ansys-sphinx-theme from 0.8.0 to 0.8.1

Bumps [ansys-sphinx-theme](https://github.com/ansys/ansys-sphinx-theme) from 0.8.0 to 0.8.1.
- [Release notes](https://github.com/ansys/ansys-sphinx-theme/releases)
- [Commits](ansys/ansys-sphinx-theme@v0.8.0...v0.8.1)

---
updated-dependencies:
- dependency-name: ansys-sphinx-theme
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements/requirements_docs.txt

@@ -10,5 +10,5 @@ pytest-sphinx==0.5.0
 sphinx-notfound-page==0.8.3
 sphinx-copybutton==0.5.0
 sphinx-gallery==0.11.1
-ansys_sphinx_theme==0.8.0
+ansys_sphinx_theme==0.8.1
 sphinx-autodoc-typehints==1.20.1