Bump ammaraskar/sphinx-action from 8.0.2 to 8.1.3

Bumps [ammaraskar/sphinx-action](https://github.com/ammaraskar/sphinx-action) from 8.0.2 to 8.1.3.
- [Release notes](https://github.com/ammaraskar/sphinx-action/releases)
- [Commits](ammaraskar/sphinx-action@8.0.2...8.1.3)

---
updated-dependencies:
- dependency-name: ammaraskar/sphinx-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/docs.yml

@@ -12,7 +12,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Build documentation
-      uses: ammaraskar/sphinx-action@8.0.2
+      uses: ammaraskar/sphinx-action@8.1.3
       with:
         docs-folder: "docs/"