Use more common help icon in MR security report

Addresses https://gitlab.com/gitlab-org/gitlab/-/issues/322770.

app/assets/javascripts/vue_shared/security_reports/components/help_icon.vue

@@ -34,7 +34,7 @@ export default {
   <span v-if="discoverProjectSecurityPath">
     <gl-button
       ref="discoverProjectSecurity"
-      icon="information-o"
+      icon="question-o"
       category="tertiary"
       :aria-label="$options.i18n.upgradeToManageVulnerabilities"
     />

changelogs/unreleased/322770-change-security-mr-widget-icon.yml

+---
+title: Use more common help icon in security report MR widget
+merge_request: 55741
+author:
+type: other