Small typo [ci skip]

[davetoxa]

😃

[zzak]

@davetoxa Please do a grep for all instances of 'overriden' in the source and send a patch. I don't want to merge this knowing there are others ;)

git grep 'overriden'
activerecord/lib/active_record/attributes.rb:30:      # The type detected by Active Record can be overriden.
activerecord/lib/active_record/type/value.rb:66:      # should not be overriden by subclasses. Instead, override `cast_value`.
guides/source/layouts_and_rendering.md:311:NOTE: Unless overriden, your response returned from this render option will be
guides/source/upgrading_ruby_on_rails.md:318:Default scopes are no longer overriden by chained conditions.
guides/source/upgrading_ruby_on_rails.md:321:it was overriden by chained conditions in the same field. Now it

[davetoxa]

@zzak done 👍

[zzak]

@davetoxa Thanks!