[TEST] Fix GitHub pages deployment

Author: mbercx

.github/workflows/deploy-docs.yaml

@@ -15,7 +15,7 @@ jobs:
 
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.x
+          python-version: 3.12
 
       # Use configured `hatch` environment for MkDocs deployment
       - run: pip install hatch