Update README.md

Author: lessw2020

README.md

@@ -1,6 +1,6 @@
 # Ranger-Deep-Learning-Optimizer
 Ranger - a synergistic optimizer combining RAdam (Rectified Adam) and LookAhead in one codebase.
-(I used LonePatient's implementation for the Lookahead part, and the official RAdam code for RAdam).
+(I built on LonePatient's implementation for the Lookahead part, and the official RAdam code for RAdam).
 
 Usage and notebook to test with comming shortly.