Update upload-pages-artifact to v3

Author: dilithjay

.github/workflows/deploy_docs.yml

@@ -32,7 +32,7 @@ jobs:
           sphinx-build -b html docs/ docs/_build/html
 
       - name: Upload documentation artifact
-        uses: actions/upload-pages-artifact@v2
+        uses: actions/upload-pages-artifact@v3
         with:
           path: docs/_build/html