Fix flaky user_sees_notes_from_forked_project_spec.rb

This test was flaky because if the merge request widget loaded, it would
shift the note outside of the browser view, which would cause the `find`
to fail. To make this more robust, we scroll the browser view to the
note before clicking on the reply button.

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/213228

spec/features/merge_request/user_sees_notes_from_forked_project_spec.rb

@@ -28,6 +28,7 @@ describe 'Merge request > User sees notes from forked project', :js do
 
     page.within('.discussion-notes') do
       find('.btn-text-field').click
+      scroll_to(page.find('#note_note', visible: false))
       find('#note_note').send_keys('A reply comment')
       find('.js-comment-button').click
     end