DEV: Add td to the element helper list (#27106)

…so it uses the more performant glimmer/template-only component wrapper instead of falling back to an ember component wrapper. see the `element` helper PR for more details.

app/assets/javascripts/discourse/app/helpers/element.gjs

@@ -9,6 +9,7 @@ const shortcuts = {
   form: <template><form ...attributes>{{yield}}</form></template>,
   a: <template><a ...attributes>{{yield}}</a></template>,
   button: <template><button ...attributes>{{yield}}</button></template>,
+  td: <template><td ...attributes>{{yield}}</td></template>,
 };
 
 /**