message: fix(replay): Fix feature detection of PerformanceObserver
  This was unintentionally find/replaced. Our Network tab basically had no data (although some did, and Im not sure how thats possible).
diff: @@ -474,8 +474,8 @@ export class ReplayContainer implements ReplayContainerInterface {
  this._handleException(err);
  }
  - // _performanceObserver //
  - if (!('_performanceObserver' in WINDOW)) {
  + // PerformanceObserver //
  + if (!('PerformanceObserver' in WINDOW)) {
  return;
  }
  