Fix the link (#16531)

Co-authored-by: Chiedo John <2156688+chiedo@users.noreply.github.com>

Author: JasonEtco

includes/helpfulness.html

@@ -9,7 +9,7 @@
     {% data ui.helpfulness.able_to_find %}
   </h4>
   <p class="f6">
-    <a href="/site-policy/github-privacy-statement">Privacy policy</a>
+    <a href="/github/site-policy/github-privacy-statement">Privacy policy</a>
   </p>
   <p
     class="radio-group"