Update option1.rs

exercises/option/option1.rs

@@ -5,7 +5,7 @@
 
 //you can modify anything EXCEPT for this function's sig
 fn print_number(maybe_number: Option<u16>) {
-    println!("printing: {}", *maybe_number);
+    println!("printing: {}", maybe_number.unwrap());
 }
 
 fn main() {
@@ -20,4 +20,4 @@ fn main() {
 
         numbers[iter] = number_to_add;
     }
-}
+}