Use less confusing terminology than yes/no

Yes/no is quite ambiguous. Correct/incorrect is more formal, but
clearer.

Right/wrong doesn’t feel quite right. Good/bad is definitely not right.

app/templates/partials/templates/guidance-personalisation.html

@@ -5,10 +5,10 @@
       Use double brackets to add personalisation.
     </p>
     <p>
-      Yes: ((name))
+      Correct: ((name))
     </p>
     <p>
-      No: ((Helen))
+      Incorrect: ((Helen))
     </p>
   </div>
 </details>