Update changelog

Author: reinink

CHANGELOG.md

@@ -13,7 +13,7 @@ For changes prior to v1.0.0, see the [legacy releases](https://legacy.inertiajs.
 
 - Fix `usePage()` reactivity in Vue 2 adapter ([#1527](https://github.com/inertiajs/inertia/pull/1527))
 
-## Changed
+### Changed
 
 - Simplify the Vue 2 form helper ([#1529](https://github.com/inertiajs/inertia/pull/1529))