message: restore accidentally-committed change
  This restores `eventsRestEndpoint` to its proper state.
diff: @@ -129,7 +129,7 @@ export const EntitySplunkOnCallCard = ({ readOnly }: Props) => {
  : undefined;
  const eventsRestEndpoint =
  - config.getOptionalString('splunkOnCall.eventsRestEndpoint') || true;
  + config.getOptionalString('splunkOnCall.eventsRestEndpoint') || null;
  const handleRefresh = useCallback(() => {
  setRefreshIncidents(x => !x);
  