Merge pull request #246 from buildkite-plugins/renovate/docker-compose-5.x

Update buildkite plugin docker-compose to v5.6.0

Author: james2791

.buildkite/pipeline.yml

@@ -5,7 +5,7 @@ steps:
 
   - label: ":ruby: Ruby"
     plugins:
-      - docker-compose#v5.5.0:
+      - docker-compose#v5.6.0:
           run: ruby
 
   - label: "✨ Lint"