message: Fix `sync-pr-commit-title` to work with GitHub's auto-merge
diff: @@ -8,11 +8,12 @@ import * as textFieldEdit from 'text-field-edit';
  import features from '.';
  import onPrMergePanelOpen from '../github-events/on-pr-merge-panel-open';
  +const mergeFormSelector = '.is-squashing form:not([hidden])';
  const prTitleFieldSelector = '.js-issue-update [name="issue[title]"]';
  const prTitleSubmitSelector = '.js-issue-update [type="submit"]';
  function getCommitTitleField(): HTMLInputElement | undefined {
  - return select<HTMLInputElement>('.is-squashing #merge_title_field') ?? undefined;
  + return select<HTMLInputElement>(`${mergeFormSelector} #merge_title_field`) ?? undefined;
  }
  function getPRNumber(): string {
  @@ -40,7 +41,7 @@ function needsSubmission(): boolean {
  }
  function getUI(): HTMLElement {
  - return select('.note.rgh-sync-pr-commit-title-note') ?? (
  + return select(`${mergeFormSelector} .rgh-sync-pr-commit-title-note`) ?? (
  <p className="note rgh-sync-pr-commit-title-note">
  The title of this PR will be updated to match this title. <button type="button" className="btn-link muted-link text-underline rgh-sync-pr-commit-title">Cancel</button>
  </p>
  