Update 034_quiz4.zig

Closes #76 By making comment more clear

exercises/034_quiz4.zig

@@ -17,7 +17,7 @@ pub fn main() void {
     try stdout.print("my_num={}\n", .{my_num});
 }
 
-// Just don't modify this function. It's "perfect" the way it is. :-)
+// This function is obviously weird and non-functional. But you will not be changing it for this quiz.
 fn getNumber() NumError!u32 {
     if (false) return NumError.IllegalNumber;
     return 42;