test: grant write permissions to a workflow for docker push (#157)

Author: supercaracal

.github/workflows/redis-cluster-proxy.yaml

@@ -16,6 +16,8 @@ jobs:
     timeout-minutes: 15
     runs-on: ubuntu-latest
     concurrency: redis-cluster-proxy
+    permissions:
+      packages: write
     defaults:
       run:
         working-directory: test/proxy/redis-cluster-proxy
@@ -26,10 +28,12 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Build image
-        run: docker build . --tag $IMAGE_NAME
+        run: |
+          docker build . --tag $IMAGE_NAME
 
       - name: Log into GitHub Container Registry
-        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login https://ghcr.io -u ${{ github.actor }} --password-stdin
+        run: |
+          echo "${{ secrets.GITHUB_TOKEN }}" | docker login https://ghcr.io -u ${{ github.actor }} --password-stdin
 
       - name: Push image to GitHub Container Registry
         run: |