Build(deps): Bump ansys-sphinx-theme from 1.1.3 to 1.1.6

Bumps [ansys-sphinx-theme](https://github.com/ansys/ansys-sphinx-theme) from 1.1.3 to 1.1.6.
- [Release notes](https://github.com/ansys/ansys-sphinx-theme/releases)
- [Commits](ansys/ansys-sphinx-theme@v1.1.3...v1.1.6)

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

Signed-off-by: dependabot[bot] <support@github.com>

pyproject.toml

@@ -48,7 +48,7 @@ tests = [
 ]
 doc = [
     "Sphinx==8.1.3",
-    "ansys-sphinx-theme==1.1.3",
+    "ansys-sphinx-theme==1.1.6",
     "sphinx-copybutton==0.5.2",
     "sphinx_design==0.6.1",
     "sphinx_toolbox==3.8.1",