update changelog

CHANGELOG.md

@@ -8,6 +8,7 @@
 * Support `{#await ... catch ...}` syntax shorthand ([#3623](https://github.com/sveltejs/svelte/issues/3623))
 * Fix attaching of JS debugging comments to HTML comments ([#4565](https://github.com/sveltejs/svelte/issues/4565))
 * Fix `<svelte:component/>` within `<slot/>` ([#4597](https://github.com/sveltejs/svelte/issues/4597))
+* Fix bug with updating simple `{#if}` blocks ([#4629](https://github.com/sveltejs/svelte/issues/4629))
 * Fix issues with `<input type="number">` updates ([#4631](https://github.com/sveltejs/svelte/issues/4631), [#4687](https://github.com/sveltejs/svelte/issues/4687))
 * Prevent illegal attribute names ([#4648](https://github.com/sveltejs/svelte/issues/4648))
 * Fix `{#if}` block directly within `<slot/>` ([#4703](https://github.com/sveltejs/svelte/issues/4703))