Merge pull request #494 from zappy-shu/fix-cnab-simple-example-upgrade-cmd

Fix example cnab-simple upgrade command in readme

Author: vdemeester

examples/cnab-simple/README.md

@@ -44,7 +44,7 @@ $ docker-app status hello
 Upgrade the installation, demonstrating setting parameters:
 
 ```console
-$ docker-app upgrade--set port=9876 --set text="hello DockerCon EU"
+$ docker-app upgrade --set port=9876 --set text="hello DockerCon EU" hello
 ```
 
 Uninstall the application installation: