docs: update

Author: rudyxu1102

active-rfcs/0000-infer-attrs.md

@@ -16,6 +16,10 @@ I already published an npm package named [vue-ts-utils](https://github.com/rudy-
 const Comp = defineComponent({
   props: {
     foo: String
+  },
+  render() {
+    // number
+    console.log(this.$attrs.bar)
   }
 }, { attrs: {} as { bar: number } })