Functional components will appear in the vue devtools 5.x version (vuejs#2112)

* Functional components will appear in the vue devtools 5.x version

* keep the original paragraph without the "However" sentence.

Co-Authored-By: bailnl <[email protected]>

Author: bailnl

src/v2/guide/render-function.md

@@ -544,7 +544,7 @@ Everything the component needs is passed through `context`, which is an object c
 
 After adding `functional: true`, updating the render function of our anchored heading component would require adding the `context` argument, updating `this.$slots.default` to `context.children`, then updating `this.level` to `context.props.level`.
 
-Since functional components are just functions, they're much cheaper to render. However, the lack of a persistent instance means they won't show up in the [Vue devtools](https://github.com/vuejs/vue-devtools) component tree.
+Since functional components are just functions, they're much cheaper to render.
 
 They're also very useful as wrapper components. For example, when you need to: