Merge pull request #26 from buildkite/renovate/docker-compose-5.x

Update buildkite plugin docker-compose to v5

Author: pzeballos

.buildkite/pipeline.yml

@@ -2,5 +2,5 @@ steps:
   - name: ":rspec:"
     command: "rspec --color specs"
     plugins:
-      docker-compose#v3.9.0:
+      docker-compose#v5.0.0:
         run: app