revert: update code to fail tests

src/main/java/com/techprimers/testing/FizzBuzz.java

@@ -5,7 +5,7 @@ public class FizzBuzz {
     public String play(int number) {
 
         if (number == 0) throw new IllegalArgumentException("Number must not be 0");
-        //if (number % 3 == 0) return "Fizz";
+        if (number % 3 == 0) return "Fizz";
         if (number % 5 == 0) return "Buzz";