Fixed footer links

Signed-off-by: Natalia Luzuriaga <natalia.luzuriaga@cms.hhs.gov>

Author: natalialuzuriaga

_includes/usa_identifier.html

@@ -7,12 +7,12 @@
       <li
         class="grid-col-12 tablet-lg:grid-col-auto usa-footer__primary-content font-body-3xs margin-bottom-0 border-top-0">
         <a class="usa-footer__primary-link padding-bottom-1 padding-top-0 tablet-lg:padding-y-2 text-base-dark"
-          href="./about"><span class="text-base-dark">About</span></a>
+          href="{{ "/about/" | url }}"><span class="text-base-dark">About</span></a>
       </li>
       <li
         class="grid-col-12 tablet-lg:grid-col-auto usa-footer__primary-content font-body-3xs margin-bottom-0 border-top-0">
         <a class="usa-footer__primary-link padding-bottom-1 padding-top-0 tablet-lg:padding-y-2 text-base-dark"
-          href="./privacy-policy"><span class="text-base-dark">Privacy
+          href="{{ "/privacy-policy/" | url }}"><span class="text-base-dark">Privacy
             Policy</span></a>
       </li>
       <li