Add hint in make release on how to refresh the running pods

Makefile

@@ -40,4 +40,4 @@ clean:
 
 .PHONY: release
 release: clean build docker_api docker_web docker_api_publish docker_web_publish
-	echo OK
+	echo OK, on the Kubernetes host execute: kubectl delete pod -l \"app in (cheerpapiapp, cheerpwebapp)\"