link front page cloud button to portal landing page

Review here

_includes/frontpage/title-content.html

@@ -7,7 +7,7 @@
     <div class="services-box">
         <div class="services-title-buttons">
             <a href="https://helmholtz.cloud" class="btn btn-light text-dark">
-            Cloud Services
+            Helmholtz Cloud
             </a>
             <a href="{% link services/software-overview.md %}" class="btn btn-light text-dark">
                 Software Services