Add missing load from cache

Author: brianhlin

action.yml

@@ -48,6 +48,12 @@ runs:
       fi
     shell: bash
 
+  - name: Import Docker images from cache
+    uses: actions/cache@v2
+    with:
+      path: /tmp/.buildx-cache
+      key: ${{ inputs.osg_series}}-${{ inputs.repo }}-buildx-${{ github.sha }}-${{ github.run_id }}
+
  - name: Set up Docker Buildx
     uses: docker/setup-buildx-action@v1