Apply suggestion from @runephilosof-abtion

Co-authored-by: Rune Philosof <57357936+runephilosof-abtion@users.noreply.github.com>

Author: grantcox

test/integration/confirmable_test.rb

@@ -365,7 +365,7 @@ def visit_admin_confirmation_with_token(confirmation_token)
 
     # Now the attacker updates to the same prior unconfirmed email address, and confirm.
     # This should update the `unconfirmed_email` in the database, even though it is unchanged from the models point of view.
-    attacker.update(email: attacker_email)
+    attacker.update!(email: attacker_email)
     attacker_token = attacker.raw_confirmation_token
     visit_admin_confirmation_with_token(attacker_token)