Fix broken builtin name in exercise 36

exercises/036_enums2.zig

@@ -57,8 +57,8 @@ pub fn main() void {
         \\</p>
         \\
     , .{
-        @enumToInt(Color.red),
-        @enumToInt(Color.green),
-        @enumToInt(???), // Oops! We're missing something!
+        @intFromEnum(Color.red),
+        @intFromEnum(Color.green),
+        @intFromEnum(???), // Oops! We're missing something!
     });
 }

patches/patches/036_enums2.patch

@@ -7,6 +7,6 @@
 ---
 >         \\  <span style="color: #{x:0>6}">Blue</span>
 62c62
-<         @enumToInt(???), // Oops! We're missing something!
+<         @intFromEnum(???), // Oops! We're missing something!
 ---
->         @enumToInt(Color.blue), // Oops! We're missing something!
+>         @intFromEnum(Color.blue), // Oops! We're missing something!