Change Citadel link to core

frontend/src/app/components/about/about.component.html

@@ -102,7 +102,7 @@
         <img class="image" src="/resources/profile/ronindojo.png" />
         <span>RoninDojo</span>
       </a>
-      <a href="https://github.com/runcitadel/dashboard" target="_blank" title="Citadel">
+      <a href="https://github.com/runcitadel/core" target="_blank" title="Citadel">
         <img class="image" src="/resources/profile/runcitadel.svg" />
         <span>Citadel</span>
       </a>