Build(deps): bump ansys-sphinx-theme

Bumps the pip-deps group in /requirements with 1 update: [ansys-sphinx-theme](https://github.com/ansys/ansys-sphinx-theme).


Updates `ansys-sphinx-theme` from 1.2.1 to 1.2.2
- [Release notes](https://github.com/ansys/ansys-sphinx-theme/releases)
- [Commits](ansys/ansys-sphinx-theme@v1.2.1...v1.2.2)

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

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

requirements/requirements_docs.txt

@@ -1,7 +1,7 @@
 Sphinx==8.1.3
 jupyter_sphinx==0.5.3
 numpydoc==1.8.0
-ansys_sphinx_theme==1.2.1
+ansys_sphinx_theme==1.2.2
 pypandoc==1.14
 pytest-sphinx==0.6.3
 sphinx-autobuild==2024.10.3