web: migrate to lit 2

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

web/src/pages/admin-overview/charts/OutpostStatusChart.ts

@@ -1,5 +1,5 @@
 import { t } from "@lingui/macro";
-import { customElement } from "lit-element";
+import { customElement } from "lit/decorators";
 import { OutpostsApi } from "@goauthentik/api";
 import { DEFAULT_CONFIG } from "../../../api/Config";
 import "../../../elements/forms/ConfirmationForm";