Update reference path to global definitions (facebook#50124)

Summary:
Pull Request resolved: facebook#50124

Changelog: [Internal]

Reviewed By: huntie

Differential Revision: D71465394

fbshipit-source-id: 17f5cee4533de8d16b2a5d164eef7c295af7b00b

Author: j-piasecki

packages/react-native/index.js.flow

@@ -15,7 +15,7 @@
 // updating React Native's public API.
 // ----------------------------------------------------------------------------
 
-/// <reference path="src/types/globals.d.ts" />
+/// <reference path="../src/types/globals.d.ts" />
 
 // #region Components