build: bump ansys-sphinx-theme[autoapi] in the docs-deps group

Bumps the docs-deps group with 1 update: [ansys-sphinx-theme[autoapi]](https://github.com/ansys/ansys-sphinx-theme).


Updates `ansys-sphinx-theme[autoapi]` from 1.3.0 to 1.3.1
- [Release notes](https://github.com/ansys/ansys-sphinx-theme/releases)
- [Commits](ansys/ansys-sphinx-theme@v1.3.0...v1.3.1)

---
updated-dependencies:
- dependency-name: ansys-sphinx-theme[autoapi]
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: docs-deps
...

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

pyproject.toml

@@ -79,7 +79,7 @@ tests-minimal = [
     "pytest-xvfb==3.0.0",
 ]
 doc = [
-    "ansys-sphinx-theme[autoapi]==1.3.0",
+    "ansys-sphinx-theme[autoapi]==1.3.1",
     "ansys-tools-path==0.7.1",
     "ansys-tools-visualization-interface==0.8.1",
     "beartype==0.19.0",