meta: add web-standards as WPTs owner

PR-URL: #50636
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Debadree Chatterjee <debadree333@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

.github/CODEOWNERS

@@ -178,3 +178,5 @@
 # Web Standards
 /lib/internal/bootstrap/web/* @nodejs/web-standards
 /lib/internal/navigator.js @nodejs/web-standards
+/test/fixtures/wpt/ @nodejs/web-standards
+/test/wpt/ @nodejs/web-standards