chore: fix typo

Author: radko93

template/App.tsx

@@ -36,7 +36,7 @@ const App = () => {
           contentInsetAdjustmentBehavior="automatic"
           style={styles.scrollView}>
           <Header />
-          {usingHermes ? null : (
+          {!usingHermes ? null : (
             <View style={styles.engine}>
               <Text style={styles.footer}>Engine: Hermes</Text>
             </View>