rename email hint string

bubble-server/src/main/resources/message_templates/en_US/server/pre_auth/ResourceMessages.properties

@@ -296,7 +296,7 @@ button_label_help=Help
 # New UI Labels
 login_title=Sign In To Your Private Bubble
 login_blurb=Just for you and completely safe
-forgot_password_field_email=Email you used to sign up
+field_email_hint=Email you used to sign up
 registration_label=Don't have an account?
 
 forgot_password_blurb=We'll email you a reset link