docs: v1.9.4

Author: jmattheis

docs/changelog.md

@@ -6,6 +6,8 @@ import GH from './GH.vue';
 
 ## unreleased
 
+## v1.9.4
+
 - Fix [`default:update`](./reference/default.md) not applying zero value checks
   for non-pointer source and target types. <GH issue="221" pr="222"/>