fixing stylesheet

Signed-off-by: NAYANAR <nayana.r5@ibm.com>

Author: NAYANAR0502

mcpgateway/templates/admin.html

@@ -104,6 +104,7 @@
       rel="stylesheet"
     />
     {% endif %}
+    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css" />
     <link href="{{ root_path }}/static/admin.css" rel="stylesheet" />
     <link href="{{ root_path }}/static/gantt-chart.css" rel="stylesheet" />
     <link href="{{ root_path }}/static/flame-graph.css" rel="stylesheet" />