Try fixing multi-line workflow commands

.github/workflows/ci-workflow.yml

@@ -25,7 +25,7 @@ jobs:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - uses: actions/checkout@v2
       - name: Prepare docker build cache
-        run:
+        run: |
           echo ${{ secrets.GITHUB_TOKEN }} | docker login docker.pkg.github.com -u $GITHUB_ACTOR --password-stdin
           docker pull docker.pkg.github.com/$GITHUB_REPOSITORY/build-cache || true
           export DOCKER_BUILD_OPTS="--cache-from=docker.pkg.github.com/$GITHUB_REPOSITORY/build-cache"
@@ -36,6 +36,6 @@ jobs:
 
       # Cache build outputs
       - name: Save docker build cache
-        run:
+        run: |
           docker tag netty-incubator-buffer:build docker.pkg.github.com/$GITHUB_REPOSITORY/build-cache
           docker push docker.pkg.github.com/$GITHUB_REPOSITORY/build-cache || true