update changelog

Author: Conduitry

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## Unreleased
 
 * Use export map to expose no-op versions of lifecycle functions for SSR ([#6743](https://github.com/sveltejs/svelte/pull/6743))
+* Prefer `context` passed to component constructor, even when running synchronously in another component ([#6753](https://github.com/sveltejs/svelte/issues/6753))
 * Handle preprocessors that return empty sourcemaps ([#6757](https://github.com/sveltejs/svelte/pull/6757))
 
 ## 3.42.6