Update ci-cd pipeline.yml

Author: JangDongHo

.github/workflows/ci-cd pipeline.yml

@@ -51,7 +51,7 @@ jobs:
         run: |
           echo "COMPOSE_CONTENT=$(base64 -w 0 ./docker-compose.yml)" >> $GITHUB_ENV
           echo "Decoded content:"
-          echo "${{ env.COMPOSE_CONTENT }}" | base64 -d
+          echo "${{ secrets.COMPOSE_CONTENT }}" | base64 -d
 
       # # 5. GCP 인증
       # - name: Authenticate to GCP