fix: focus raf times

Author: MadCcc

docs/examples/simple.jsx

@@ -27,6 +27,7 @@ export default function Simple() {
       <div style={{ height: 100 }} />
       <div>
         <Dropdown
+          autoFocus
           trigger={['click']}
           overlay={menu}
           animation="slide-up"

src/hooks/useAccessibility.ts

@@ -59,7 +59,7 @@ export default function useAccessibility({
       window.addEventListener('keydown', handleKeyDown);
       if (autoFocus) {
         // FIXME: hack with raf
-        raf(focusMenu);
+        raf(focusMenu, 3);
       }
       return () => {
         window.removeEventListener('keydown', handleKeyDown);