Docs: Classify as change, not enhancement

[ci skip]

CHANGELOG.md

@@ -6,11 +6,11 @@
   PaperTrail is no longer recommended. An alternative is described in the
   readme. See https://github.com/airblade/paper_trail/pull/557 and
   https://github.com/airblade/paper_trail/pull/492.
+- If you depend on the `RSpec` or `Cucumber` helpers, you must
+  [require them in your test helper](https://github.com/airblade/paper_trail#testing).
 
 ### Enhancements
 
-If you depend on the `RSpec` or `Cucumber` helpers, you will need to [manually load them into your test helper](https://github.com/airblade/paper_trail#testing).
-
   - [#563](https://github.com/airblade/paper_trail/pull/563) - Fixed a bug in 
     `PaperTrail::Model::InstanceMethods#touch_with_version` so that it will trigger a version when the `on` option
     was set to `[:create]`