Update roadmap.rst

docs/roadmap.rst

@@ -6,7 +6,7 @@ The development goals and current work include:
 - to expose 100% of Keras functionality to the user
 - to create robust synthesis of generality and performance in a single metric 
 - to use the synthesis score as a metric for optimizing the hyperparameter optimization process
-- to allow on-to-go model ensembling
+- to allow on-the-go model ensembling
 - to allow *reverse inheritance* of the optimization capacity i.e. models that build models that...
 
 These goals are currently being met by systematically building simple, easy-to-understand building blocks that solve manageable parts of the challenge.