fix(readme): init script

Currently, `npx react-native init MyApp --template react-native-template-typescript` throws an error because react-native-cli is trying to fetch `react-native-template-react-native-template-typescript`, so `react-native-template` prefix is redundant here

Author: artyorsh

README.md

@@ -28,7 +28,7 @@
 ### React Native >= 0.60
 
 ```sh
-npx react-native init MyApp --template react-native-template-typescript
+npx react-native init MyApp --template typescript
 ```
 
 ## :computer: Contributing