update changelog

Author: Conduitry

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 * Fix `{#each}` context not shadowing outer scope when using `bind:` ([#1565](https://github.com/sveltejs/svelte/issues/1565))
 * Fix edge cases in matching selectors against elements ([#1710](https://github.com/sveltejs/svelte/issues/1710))
+* Allow exiting a reactive block early with `break $` ([#2828](https://github.com/sveltejs/svelte/issues/2828))
 * Check attributes have changed before setting them to avoid image flicker ([#3579](https://github.com/sveltejs/svelte/pull/3579))
 * Fix generating malformed code for `{@debug}` tags with no dependencies ([#3588](https://github.com/sveltejs/svelte/issue/3588))
 * Use safer `HTMLElement` check before extending class ([#3608](https://github.com/sveltejs/svelte/issue/3608))