Adding comment explaining aria-hidden prop addition

Author: meatnordrink

src/components/RadioButton/RadioButtonItem.tsx

@@ -177,6 +177,7 @@ const RadioButtonItem = ({
   let radioButton: any;
 
   if (mode === 'android') {
+    // aria-hidden ensures that Talkback does not read out the interior radio button as a separate element
     radioButton = <RadioButtonAndroid {...radioButtonProps} aria-hidden />;
   } else if (mode === 'ios') {
     radioButton = <RadioButtonIOS {...radioButtonProps} />;