Fix translation

jet/templates/admin/base.html

@@ -337,7 +337,7 @@
                                         {{ app.label }}
                                     </div>
 
-                                    <input class="sidebar-popup-search" placeholder="Search...">
+                                    <input class="sidebar-popup-search" placeholder="{% trans "Search" %}...">
 
                                     <ul class="sidebar-popup-list">
                                         {% if app.url %}