Add query value to security tab

- where there wasn't one, it just said `tab=1`, now it says
  `tab=security`

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

@@ -28,7 +28,7 @@ export default {
 <template>
   <agent-show-page>
     <template v-if="showSecurityTab" #ee-security-tab="{ clusterAgentId }">
-      <gl-tab :title="$options.i18n.securityTabTitle">
+      <gl-tab :title="$options.i18n.securityTabTitle" query-param-value="security">
         <agent-vulnerability-report :cluster-agent-id="clusterAgentId" />
       </gl-tab>
     </template>