Update strings.

en.json

@@ -77,8 +77,8 @@
                 },
                 "signed_out": "You were signed out!",
                 "onboarding": {
-                    "welcome": "Welcome to REVOLT!",
-                    "pick": "Please pick a username."
+                    "welcome": "Welcome to",
+                    "pick": "Pick a username that you want people to be able to find you by, this can be changed later in settings."
                 },
                 "prompt": {
                     "confirm_leave": "Leave {{group_name}}?",