update heading for device fleet

Author: imdawon

cmd/dashboard/ui/static/clients.html

@@ -40,7 +40,7 @@ <h2>Emissary Bundle</h2>
 
       </div>
       <div id="devices" class="section">
-        <h2>Device Fleet</h2>
+        <h2>Manage Emissary Device Fleet</h2>
         <ul id="device-fleet-list" hx-get="/emissary/get/clients" hx-trigger="load" hx-target="this" hx-swap="outerHTML"></ul>
       </div>
     </div>