Update bot preference text (#7507)

* Update simple_form.en.yml

* fix #2

config/locales/simple_form.en.yml

@@ -4,7 +4,7 @@ en:
     hints:
       defaults:
         avatar: PNG, GIF or JPG. At most 2MB. Will be downscaled to 400x400px
-        bot: Warns people that the account does not represent a person
+        bot: This account mainly performs automated actions and might not be monitored
         digest: Only sent after a long period of inactivity and only if you have received any personal messages in your absence
         display_name:
           one: <span class="name-counter">1</span> character left