fix(spotlight): Export spotlightBrowserIntegration from the main brow…

…ser package (#14208)

Follow up to #13263 where we forgot to export it from the main package
:facepalm:

packages/browser/src/index.ts

@@ -74,3 +74,4 @@ export {
 export type { Span } from '@sentry/types';
 export { makeBrowserOfflineTransport } from './transports/offline';
 export { browserProfilingIntegration } from './profiling/integration';
+export { spotlightBrowserIntegration } from './integrations/spotlight';