Update README.md

Author: EddyVerbruggen

README.md

@@ -54,7 +54,7 @@ Then open `references.d.ts` in the root of your project and add this line to get
 ```
 
 ### iOS
-[Looking to automate this step](#136), but for now, to build with Xcode 8 (iOS 10 SDK), you need to open the Xcode project via the platforms/ios/appname.__xcworkspace__/ file - then select your app's target, capabilities, enable 'Keychain sharing'.
+[Looking to automate this step](https://github.com/EddyVerbruggen/nativescript-plugin-firebase/issues/136), but for now, to build with Xcode 8 (iOS 10 SDK), you need to open the Xcode project via the platforms/ios/appname.__xcworkspace__/ file - then select your app's target, capabilities, enable 'Keychain sharing'.
 
 ### Android
 Install packages 'Google Play Services' and 'Google Repository' in your [Android SDK Manager](http://stackoverflow.com/a/37310513)