Fix commons-app#2605: Wording of no notification message (commons-app#2606)

Author: domdomegg

app/src/main/res/values/strings.xml

@@ -462,8 +462,8 @@ Upload your first media by tapping on the add button.</string>
   <string name="no_image_reverted">No images reverted</string>
   <string name="no_image_uploaded">No images uploaded</string>
 
-  <string name="no_notification">You have no unread Notification</string>
-  <string name="no_archived_notification">You have no archived notification</string>
+  <string name="no_notification">You have no unread notifications</string>
+  <string name="no_archived_notification">You have no archived notifications</string>
   <string name="share_logs_using">Share logs using</string>
   <string name="menu_option_archived">View archived</string>
   <string name="menu_option_unread">View unread</string>