switch to svg icons

layouts/partials/header-contest.html

@@ -5,7 +5,7 @@
     {{ end }}
     <div class="d-flex justify-content-between mb-4">
       <div class="d-flex align-items-center">
-        <i class="mdi mdi-crowd text-primary icon-md me-2"></i>
+        <span class="text-primary icon-md me-2 d-flex">{{ partial "mdi" "crowd"}}</span>
         <div class="text-start">
           <h6 class="mb-0 text-uppercase">Klassen</h6>
           <p class="mb-0">{{ .Params.class }}</p>