test_docker_build: use 'docker compose' instead of 'docker-compose'

Author: bkueng

.github/workflows/test_docker_build.yml

@@ -14,5 +14,5 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Build the stack
-        run: docker-compose build --no-cache
+        run: docker compose build --no-cache