ci: Update actions/upload-pages-artifact to v3 (#1807)

Author: schloerke

.github/workflows/build-docs.yaml

@@ -97,7 +97,7 @@ jobs:
 
       - name: Upload site artifact
         if: github.ref == 'refs/heads/main'
-        uses: actions/upload-pages-artifact@v1
+        uses: actions/upload-pages-artifact@v3
         with:
           path: "deploy"