fix(feedback): Fixing feedback import (#9403)

Fix feedback import in README.

Author: IanWoodard

packages/feedback/README.md

@@ -32,7 +32,7 @@ Several options are supported and passable via the integration constructor. See
 import * as Sentry from '@sentry/browser';
 // or from a framework specific SDK, e.g.
 // import * as Sentry from '@sentry/react';
-import Feedback from '@sentry-internal/feedback';
+import { Feedback } from '@sentry-internal/feedback';
 
 Sentry.init({
   dsn: '__DSN__',