Fix import in gr-copy-links

Release-Notes: skip
Change-Id: Iff333486e3581febc758b34a9437efac134aee2a
diff --git a/polygerrit-ui/app/elements/change/gr-copy-links/gr-copy-links.ts b/polygerrit-ui/app/elements/change/gr-copy-links/gr-copy-links.ts
index c9f8aaf..4b76625 100644
--- a/polygerrit-ui/app/elements/change/gr-copy-links/gr-copy-links.ts
+++ b/polygerrit-ui/app/elements/change/gr-copy-links/gr-copy-links.ts
@@ -9,7 +9,7 @@
 import {LitElement, html, css, nothing} from 'lit';
 import {customElement, property, query, state} from 'lit/decorators.js';
 import {strToClassName} from '../../../utils/dom-util';
-import {IronDropdownElement} from '@polymer/iron-dropdown';
+import {IronDropdownElement} from '@polymer/iron-dropdown/iron-dropdown';
 import {copyToClipbard, queryAndAssert} from '../../../utils/common-util';
 import {ValueChangedEvent} from '../../../types/events';