message: Add comment to top of autogenerated files
diff: @@ -36,6 +36,9 @@ export type Visibility = 'hidden' | 'postUnite' | 'visible';
  export function renderYamlFrontMatter(frontMatter: FrontMatter) {
  let matter = '---\n';
  + const date = new Date();
  + matter += `# This file was autogenerated from shopify/ui-extensions\n`;
  +
  (Object.keys(frontMatter) as (keyof FrontMatter)[]).forEach((key) => {
  matter += `${key}: ${frontMatter[key]}\n`;
  });
  