fix: search-banner background

Author: Rom1-B

css/helpdesk_home.scss

@@ -102,8 +102,8 @@ header {
 
 .search-banner {
     background:
-        url('/pics/serfservice-portal-header-1.svg') no-repeat bottom right,
-        url('/pics/serfservice-portal-header-2.svg') no-repeat bottom left
+        url('../pics/serfservice-portal-header-1.svg') no-repeat bottom right,
+        url('../pics/serfservice-portal-header-2.svg') no-repeat bottom left
     ;
     background-color: var(--glpi-helpdesk-header);
     padding-top:150px;