zig, minor: fix zig 0.16 merge

src/browser/ScriptManager.zig

@@ -615,7 +615,7 @@ test "ScriptManager: waitForPreload stops when teardown is pending" {
         .node = .{},
         .manager = &sm.base,
         .complete = false,
-        .source = .{ .remote = .{} },
+        .source = .{ .remote = .empty },
         .extra = .preload,
         .hint_element = null,
     };

src/browser/ScriptManagerBase.zig

@@ -1123,7 +1123,7 @@ test "ScriptManagerBase: waitForImport stops when teardown is pending" {
         .node = .{},
         .manager = sm,
         .complete = false,
-        .source = .{ .remote = .{} },
+        .source = .{ .remote = .empty },
         .extra = .import,
         .hint_element = null,
     };