Merge pull request #52195 from jaynetics/fix-ar-dirty-doc

Fix ActiveRecord dirty docs

activerecord/lib/active_record/attribute_methods/dirty.rb

@@ -31,7 +31,7 @@ module AttributeMethods
  # person.name_in_database # => "Alice"
  # person.saved_change_to_name? # => true
  # person.saved_change_to_name # => ["Allison", "Alice"]
- # person.name_before_last_change # => "Allison"
+ # person.name_before_last_save  # => "Allison"
  #
  # Similar to ActiveModel::Dirty, methods can be invoked as
  # +saved_change_to_name?+ or by passing an argument to the generic method