Fix tooltip on vulnerability issue in dashboard

- the tooltip was not imported properly to display the issue
  text of a vulnerability

ee/app/assets/javascripts/vulnerabilities/components/issue_link.vue

 <script>
-import { GlIcon, GlLink } from '@gitlab/ui';
+import { GlIcon, GlLink, GlTooltipDirective } from '@gitlab/ui';
 
 export default {
   components: {
     GlIcon,
     GlLink,
   },
+  directives: {
+    GlTooltip: GlTooltipDirective,
+  },
   props: {
     issue: {
       type: Object,

ee/changelogs/unreleased/fix-tooltip-on-vulnerability-issue-in-dashboard.yml

+---
+title: Fix tooltip on vulnerability issue in security dashboard
+merge_request: 34560
+author:
+type: fixed