Merge pull request #120 from Fep310/patch-1

Update link to SerializeReference unity doc page

Author: nuskey8

docs/articles/en/serialize-reference.md

@@ -37,4 +37,4 @@ public class SerializeReferenceExample : MonoBehaviour
 
 Interfaces and abstract classes are displayed as shown above, and you can select and create subclasses from the dropdown.
 
-For more information about SerializeReference serialization, please refer to [Unity's official documentation](https://docs.unity3d.com/2020.3/ScriptReference/SerializeReference.html).
+For more information about SerializeReference serialization, please refer to [Unity's official documentation](https://docs.unity3d.com/6000.1/Documentation/ScriptReference/SerializeReference.html).