Update test context string

Co-authored-by: Brent Kroeker <[email protected]>

spec/basic_history_spec.rb

@@ -266,7 +266,7 @@
 end
 
 describe Hamster do
-  context 'when a hamster and wheel exist' do
+  context 'with tables that have non-default primary key names' do
     let(:hamster) { Hamster.create name: 'Fluffy' }
     let(:wheel) { HamsterWheel.create hamster: hamster }