Bump ansys-sphinx-theme from 1.1.7 to 1.2.1

Bumps [ansys-sphinx-theme](https://github.com/ansys/ansys-sphinx-theme) from 1.1.7 to 1.2.1.
- [Release notes](https://github.com/ansys/ansys-sphinx-theme/releases)
- [Commits](ansys/ansys-sphinx-theme@v1.1.7...v1.2.1)

---
updated-dependencies:
- dependency-name: ansys-sphinx-theme
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

poetry.lock

@@ -71,7 +71,7 @@ optional = true
 
 [tool.poetry.group.doc.dependencies]
 # Doc packages
-ansys-sphinx-theme = ">=0.12,<1.2"
+ansys-sphinx-theme = ">=0.12,<1.3"
 numpydoc = "^1.6.0"
 sphinx = ">=7.1,<9.0"
 sphinx-notfound-page = "^1.0.0"