add missing I18n imports

assets/javascripts/discourse/components/modal/admin-wizards-columns.js

@@ -1,5 +1,6 @@
 import Component from "@glimmer/component";
 import { action } from "@ember/object";
+import I18n from "I18n";
 
 export default class AdminWizardsColumnComponent extends Component {
   title = I18n.t("admin.wizard.edit_columns");

assets/javascripts/discourse/components/modal/next-session-scheduled.js

@@ -1,6 +1,7 @@
 import Component from "@glimmer/component";
 import { tracked } from "@glimmer/tracking";
 import { action } from "@ember/object";
+import I18n from "I18n";
 
 export default class NextSessionScheduledComponent extends Component {
   @tracked bufferedDateTime;