updated missing string
updated missing string

ignatirabo/RedditReader-android,AIDEA775/AndroidRedditReader,santimarro/RedditReader,fernandoCba/AndroidClasses,rami-de/android,alki22/RedditReader-alki22,gasparinielias/mobiletraining,FedericoLlamas/TutorialAndroid,PedroNieto/ActivitiesAssignment,aguilarj/Reddit-Reader