Update README.md

Author: Cory Leach

README.md

@@ -70,7 +70,10 @@ manager.LoadUnityObjectOverwrite(myScriptableObject,"MyUnityObjectData.data");
 
 ## Enable Json.Net Support
 
-Ensure the [Json.Net for Unity](https://assetstore.unity.com/packages/tools/input-management/json-net-for-unity-11347) package has been imported.</br>
+Import the Netwonsoft Json package from the package manager or copy and paste the below into your package manifest.
+```C#
+"com.unity.nuget.newtonsoft-json": "3.0.2"
+```
 In player settings add the string 'JSON_DOT_NET' to Scripting Define Symbols.
 
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