fix: typo

Author: rudyxu1102

active-rfcs/0000-infer-attrs.md

@@ -4,7 +4,8 @@
 - Implementation PR: [vuejs/core#7444](https://github.com/vuejs/core/pull/7444)
 
 # Summary
-Allow to infer `attrs` when passing type on the second param of`defineComponent`. And In the `setup-script`,  passing generic type on the `useAttrs<T>` make `attrs` inferred.
+Allow to infer `attrs` when passing type on the second param of `defineComponent` and `defineCustomElement`. 
+And in the `setup-script`,  passing generic type on the `useAttrs<T>` make `attrs` inferred.
 
 I already published an npm package named [vue-ts-utils](https://github.com/rudy-xhd/vue-ts-utils), so that you can use `defineComponent` to infer attrs in advance.