Bump ansys-sphinx-theme from 0.16.0 to 1.0.9 (#694)

Bumps [ansys-sphinx-theme](https://github.com/ansys/ansys-sphinx-theme) from 0.16.0 to 1.0.9.
- [Release notes](https://github.com/ansys/ansys-sphinx-theme/releases)
- [Commits](ansys/ansys-sphinx-theme@v0.16.0...v1.0.9)

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

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

@@ -11,7 +11,7 @@ pytest-sphinx==0.6.3
 sphinx-notfound-page==1.0.0
 sphinx-copybutton==0.5.0
 sphinx-gallery==0.16.0
-ansys_sphinx_theme==0.16.0
+ansys_sphinx_theme==1.0.9
 sphinx-autodoc-typehints==2.0.0; python_version == '3.8'
 sphinx-autodoc-typehints==2.4.1; python_version >= '3.9'
 pyvista==0.43.8