Update src/Training_Phase/Clustering/README.md

src/Training_Phase/Clustering/README.md

-I don't own this part of code. This code is originally bases of Streamspot clustering code with slight modificiations.
+I don't own this part of code. This code is originally based on Streamspot's clustering algorithm with slight modificiations.
 
 Original source :  https://github.com/sbustreamspot/sbustreamspot-train