chore(quiz1): revert wording

exercises/quiz1.rs

@@ -4,7 +4,7 @@
 // - Functions
 
 // Mary is buying apples. One apple usually costs 2 Rustbucks, but if you buy
-// 40 or more at once, each apple only costs 1! Write a function that calculates
+// more than 40 at once, each apple only costs 1! Write a function that calculates
 // the price of an order of apples given the quantity bought. No hints this time!
 
 // I AM NOT DONE