docs: delete attrs and slots are not reactive

Author: snowbitx

src/api/composition-api-setup.md

@@ -111,7 +111,7 @@ export default {
 }
 ```
 
-`attrs` and `slots` are stateful objects that are always updated when the component itself is updated. This means you should avoid destructuring them and always reference properties as `attrs.x` or `slots.x`. Also note that, unlike `props`, the properties of `attrs` and `slots` are **not** reactive. If you intend to apply side effects based on changes to `attrs` or `slots`, you should do so inside an `onBeforeUpdate` lifecycle hook.
+`attrs` and `slots` are stateful objects that are always updated when the component itself is updated. This means you should avoid destructuring them and always reference properties as `attrs.x` or `slots.x`. If you intend to apply side effects based on changes to `attrs` or `slots`, you should do so inside an `onBeforeUpdate` lifecycle hook.
 
 ### Exposing Public Properties {#exposing-public-properties}