refactor: use accessibility label in example

Author: lukewalczak

example/src/Examples/FABExample.tsx

@@ -123,7 +123,7 @@ const FABExample = () => {
           <FAB.Group
             open={open}
             icon={open ? 'calendar-today' : 'plus'}
-            aria-label="Calendar FAB"
+            accessibilityLabel="Calendar FAB"
             toggleStackOnLongPress={toggleStackOnLongPress}
             actions={[
               { icon: 'plus', onPress: () => {} },