Fix install instruction

the other always fails for me, that's super annoying... Even with the commands below.

README.md

@@ -13,20 +13,9 @@ experience.
 ## Start a Reason React Native project with this template
 
 ```console
-npx react-native init MyApp --template @reason-react-native/template
+npx @react-native-community/cli init MyApp --template @reason-react-native/template
 cd MyApp
 ```
 
-⚠️ In case you got an error saying it's looking for
-`react-native-template-reason-react-native-template`, be sure to have
-uninstalled any previous react-native-cli version & rely on `npx`
-
-```console
-npm -g uninstall react-native
-npm -g uninstall react-native-cli
-yarn global remove react-native
-yarn global remove react-native-cli
-```
-
 Now that you are ready to go, you can check our documentation on
 [how to use Reason React Native](https://reason-react-native.github.io/en/docs/usage/).