zig: address a macro todo (#23677)

src/ast/Macro.zig

@@ -591,9 +591,7 @@ pub const Runner = struct {
             }
         };
 
-        // TODO: can change back to `return CallData.callWrapper(.{`
-        // when https://github.com/ziglang/zig/issues/16242 is fixed
-        return CallData.callWrapper(CallArgs{
+        return CallData.callWrapper(.{
             macro,
             log,
             allocator,