Make footer link conditional

Author: eric-schneider

src/partials/footer.hbs

@@ -24,12 +24,14 @@
           target="_blank"
           data-track="Footer Terms of Use Link Clicked"
         >Terms of use</a>
+        {{#with site.keys.ketchSmartTagUrl}}
         |
         <a
           id="preferenceCenterLink"
           href="https://www.datastax.com/preferences"
           data-track="Footer Consent Preference Management Link Clicked"
         >Manage Privacy Choices</a>
+        {{/with}}
       </span>
     </p>
     <p class="text-tertiary !m-0 max-w-[640px] text-xs">Apache, Apache