Correct school name in default SMS opt-out message

For school administrators using GiveCampus Outreach. Controls can differ between the classic email editor and the newer Composer editor.

Open Texting Settings (or Outreach → Text Settings in the available interface), edit Default Opt Out Message to correct the school name, retain the intended sender token and STOP instructions, and save. This setting is automatically appended when a user texts a recipient from a new phone number; it does not rewrite texts already sent. Preview a new-message example before the next send.