Update README.md

Author: quabug

README.md

@@ -70,4 +70,4 @@ public class MyMonoBehavior : MonoBehaviour
 ## License
 [MIT](https://github.com/quabug/GenericSerializeReference/blob/main/LICENSE)
 
-Drawer modified from [TextusGames](https://github.com/TextusGames)'s [UnitySerializedReferenceUI](https://github.com/TextusGames/UnitySerializedReferenceUI) with [MIT](https://github.com/TextusGames/UnitySerializedReferenceUI/blob/master/Assets/Textus/SerializeReferenceUI/LICENSE.txt) license
+[Drawer](Packages/generic-serialize-reference/Editor/GenericSerializeReferenceFieldAttributeDrawer.cs) modified from [TextusGames](https://github.com/TextusGames)'s [UnitySerializedReferenceUI](https://github.com/TextusGames/UnitySerializedReferenceUI) with [MIT](https://github.com/TextusGames/UnitySerializedReferenceUI/blob/master/Assets/Textus/SerializeReferenceUI/LICENSE.txt) license