Add card-header links to project pages

templates/frontpage/blocks/projects.html

@@ -19,7 +19,7 @@
         <div class="card-content">
           <div class="media">
             <div class="media-content">
-              <p class="title is-4">{{ project_section.title }}</p>
+              <a href="/projekte/{{ project_section.extra.project_slug }}"><h1 class="title is-4">{{ project_section.title }}</h1></a>
             </div>
           </div>