[Bug] Mistakes in Compose TV skill

Affected Skill

tv/leanback-to-compose-tv-migration/references/android/training/tv/playback/compose/browse.md

Description

There is a typo and a few mistakes where old API names are used.

Suggested Fix

In the sample code for FeaturedCarousel, function is used instead of func

TvLazyColumn should be LazyColumn as mentioned here: https://medium.com/androiddevelopers/migrating-compose-for-tv-from-alpha-to-stable-b0074d6fd350