Update readme.txt

readme.txt

@@ -1,8 +1,8 @@
 USAGE:
-python3 main.py <{'|'.join(cmds)}>
+python3 main.py <max|and
 max = guess fraudulent if the heuristic for the best column finds it
 and = guess fraudulent if ALL the heuristics determined to be good find it
 
 the goodness of a heuristic is determined by the proportion of rows it can correctly determine the class of
 
-i.e. if the accuracy is .90, guess = Class 90% of the time
+i.e. if the accuracy is .90, guess = Class 90% of the time