message: fix(plugins/pagerduty): properly type optional variable
diff: @@ -54,7 +54,7 @@ export const ChangeEventListItem = ({ changeEvent }: Props) => {
  const changedAt = DateTime.local()
  .minus(Duration.fromMillis(duration))
  .toRelative({ locale: 'en' });
  - let externalLinkElem = null;
  + let externalLinkElem: JSX.Element | undefined;
  if (changeEvent.links.length > 0) {
  const text: string = changeEvent.links[0].text;
  externalLinkElem = (
  