Make failed challenge accurate

Author: Beau Shinkle

README.md

@@ -60,5 +60,4 @@ same group selection with the same seed and validates the results.
 
 If the submission was invalid, the challenger is rewarded and the submitter is
 punished, and we can accept another submission. If the submission was valid,
-the challenger loses out on their gas, the submitter is unaffected, and the
-submission is accepted.
+the challenger loses out on their gas, and the submitter is unaffected.