Move security tab to after the activity tab

- for cluster agents, the activity tab is more important
  than the security tab

app/assets/javascripts/clusters/agents/components/show.vue

@@ -122,12 +122,12 @@ export default {
       </p>
 
       <gl-tabs sync-active-tab-with-query-params lazy>
-        <slot name="ee-security-tab" :cluster-agent-id="clusterAgent.id"></slot>
-
         <gl-tab :title="$options.i18n.activity" query-param-value="activity">
           <activity-events :agent-name="agentName" :project-path="projectPath" />
         </gl-tab>
 
+        <slot name="ee-security-tab" :cluster-agent-id="clusterAgent.id"></slot>
+
         <gl-tab query-param-value="tokens">
           <template #title>
             <span data-testid="cluster-agent-token-count">