Document behaviour of setting state inside useLayoutEffect (#7096)

Co-authored-by: Sebastian Silbermann <[email protected]>

Author: OliverJAsh

src/content/reference/react/useLayoutEffect.md

@@ -67,6 +67,8 @@ function Tooltip() {
 
 * The code inside `useLayoutEffect` and all state updates scheduled from it **block the browser from repainting the screen.** When used excessively, this makes your app slow. When possible, prefer [`useEffect`.](/reference/react/useEffect)
 
+* If you trigger a state update inside `useLayoutEffect`, React will execute all remaining Effects immediately including `useEffect`.
+
 ---
 
 ## Usage {/*usage*/}