build: changes default container to be accurate

Jenkinsfile

@@ -4,7 +4,7 @@ pipeline {
 		label 'deepdog'  // all your pods will be named with this prefix, followed by a unique id
 		idleMinutes 5  // how long the pod will live after no jobs have run on it
 		yamlFile 'jenkins/ci-agent-pod.yaml'  // path to the pod definition relative to the root of our project
-		defaultContainer 'python'  // define a default container if more than a few stages use it, will default to jnlp container
+		defaultContainer 'poetry'  // define a default container if more than a few stages use it, will default to jnlp container
 	  }
 	}