fix typo

com.unity.perception/Documentation~/Schema/Synthetic_Dataset_Schema.md

 ## example
 
 A mockup of synthetic dataset according to this schema can be found 
-[here](https://github.com/Unity-Technologies/com.unity.perception/tree/master/com.unity.perception/Documentation~/Schema/mock_data/simrun). In this mockup, we have:
+[here](https://github.com/Unity-Technologies/com.unity.perception/tree/master/com.unity.perception/Documentation~/Schema/mock_data/simrun).