Update docs.yaml

.github/workflows/docs.yaml

@@ -23,7 +23,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: "3.12"
           cache: pip
@@ -35,7 +35,12 @@ jobs:
           pip install .[docs]
 
       - name: Build docs
-        run: mkdocs build
+        run: |
+          if [ "${{ github.event_name }}" == "pull_request" ]; then
+            mkdocs build --strict
+          else
+            mkdocs build
+          fi
         id: build_docs
 
       - name: Rebuild and deploy docs