[motd]: Lower-case 'i' in title (#398)

Author: jleveque

files/image_config/environment/motd

@@ -5,7 +5,7 @@ You are on
   ___) | |_| | |\  | | |___
  |____/ \___/|_| \_|_|\____|
 
--- Software for Open Networking In the Cloud --
+-- Software for Open Networking in the Cloud --
 
 Unauthorized access and/or use are prohibited.
 All access and/or use are subject to monitoring.