maint: bump ansys-sphinx-theme from 1.1.7 to 1.2.0

Bumps [ansys-sphinx-theme](https://github.com/ansys/ansys-sphinx-theme) from 1.1.7 to 1.2.0.
- [Release notes](https://github.com/ansys/ansys-sphinx-theme/releases)
- [Commits](ansys/ansys-sphinx-theme@v1.1.7...v1.2.0)

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

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

pyproject.toml

@@ -48,7 +48,7 @@ doc = [
     "Sphinx==8.1.3",
     "ansys-mapdl-core==0.68.6",
     "ansys-mapdl-reader==0.54.1",
-    "ansys-sphinx-theme==1.1.7",
+    "ansys-sphinx-theme==1.2.0",
     "jupyter_sphinx==0.5.3",
     "jupyterlab==4.2.5",
     "numpydoc==1.8.0",