Update accumulate.janet

Author: sogaiu

examples/accumulate.janet

@@ -1,4 +1,4 @@
-(reduce + 0 [1 2 3 4]) #-> 10
+(reduce + 0 [1 2 3 4]) # -> 10
 (accumulate + 0 [1 2 3 4]) # -> @[1 3 6 10]
 
 (reduce + 0 []) # -> 0