cancel previous workflow proxy

Author: michaljaz

.github/workflows/proxy.yaml

@@ -10,6 +10,11 @@ jobs:
       - name: Checkout 🛎️
         uses: actions/checkout@v2.3.1
 
+      - name: Cancel Previous Runs
+        uses: styfle/cancel-workflow-action@0.9.0
+        with:
+          access_token: ${{ github.token }}
+
       - name: Install and Run proxy 🔧
         run: |
           npm install