Fix wording in quiz1 to match test condition

This change updates the wording in quiz1 to match the test logic.
The condition now correctly states "40 or more apples" instead of "more than 40".

Author: muskan-773

exercises/quizzes/quiz1.rs

@@ -5,7 +5,7 @@
 //
 // Mary is buying apples. The price of an apple is calculated as follows:
 // - An apple costs 2 rustbucks.
-// - However, if Mary buys more than 40 apples, the price of each apple in the
+// - However, if Mary buys 40 or more apples, the price of each apple in the
 // entire order is reduced to only 1 rustbuck!
 
 // TODO: Write a function that calculates the price of an order of apples given