docs: remove ref typings warning as it is no longer needed

Author: TimKolberger

README.md

@@ -27,12 +27,6 @@ const App = () => (
 )
 ```
 
-> **Known drawbacks for the type definitions:**
->
-> Event handlers are not typed correctly when using the `as` prop.
->
-> This is a deliberate decision to keep the usage as simple as possible.
-
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 ## Packages