Bump ansys-sphinx-theme from 0.5.0 to 0.5.1 (#137)

Bumps [ansys-sphinx-theme](https://github.com/ansys/ansys-sphinx-theme) from 0.5.0 to 0.5.1.
- [Release notes](https://github.com/ansys/ansys-sphinx-theme/releases)
- [Commits](ansys/ansys-sphinx-theme@v0.5.0...v0.5.1)

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

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

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

@@ -10,4 +10,4 @@ pytest-sphinx==0.4.0
 sphinx-notfound-page==0.8.3
 sphinx-copybutton==0.5.0
 sphinx-gallery==0.11.0
-ansys_sphinx_theme==0.5.0
+ansys_sphinx_theme==0.5.1