Fix browser performance widget

Widget was moved to its own file in when tracking event was added
but the componentNames import was not copied properly

ee/app/assets/javascripts/reports/browser_performance_report/grouped_browser_performance_reports_app.vue

 <script>
 import { once } from 'lodash';
-import { componentNames } from '~/reports/components/issue_body';
+import { componentNames } from 'ee/reports/components/issue_body';
 import ReportSection from '~/reports/components/report_section.vue';
 import glFeatureFlagsMixin from '~/vue_shared/mixins/gl_feature_flags_mixin';
 import api from '~/api';