all: update README

Author: arnaud-roland

README.md

@@ -18,7 +18,7 @@ As this plugin is built over Batch's Native SDKs, their respective Android and i
 You may also find this guide useful to review after integration to make sure you're ready to go live: [How can I test the integration on iOS?](https://help.batch.com/en/articles/2669866-how-can-i-test-the-integration-on-ios) / [How can I test the integration on Android?](https://help.batch.com/en/articles/2672749-how-can-i-test-the-integration-on-android)
 
 # Releases
-The plugin is available on npm.
+Release instructions are detailed in [RELEASING.md](https://github.com/BatchLabs/sdk.temp.react-native-plugin/blob/master/RELEASING.md).
 
 # Building
 Build instructions are detailed in [BUILDING.md](https://github.com/BatchLabs/sdk.temp.react-native-plugin/blob/master/BUILDING.md).