Add package name

piscine imported not being used,

subjects/maxwordcountn/README.md

@@ -26,7 +26,7 @@ import (
 )
 
 func main() {
-	fmt.Println(MaxWordCountN(`
+	fmt.Println(piscine.MaxWordCountN(`
 	Orange Orange is the sun sliding to the horizon after a summer day. Orange is the sound of dribbling basetball. Orange is the smell of a tiger lily petal. Orange is the taste of thirst-quenching Nehi Soda. Orange is the color of peach marmalade on a side of toast. Orange is the sound of a carrot popping out of the ground.
 	`, 3))
 }