fix(flatten-threads): fix DOMPurify import

Change-Id: Ibf53e283b3d2378718ba3682dc520dc84d0dd737
diff --git a/src/features/flattenThreads/core/components/index.js b/src/features/flattenThreads/core/components/index.js
index f1da3b0..df44a23 100644
--- a/src/features/flattenThreads/core/components/index.js
+++ b/src/features/flattenThreads/core/components/index.js
@@ -6,7 +6,7 @@
 import './ReplyButton.js';
 
 import {msg} from '@lit/localize';
-import * as DOMPurify from 'dompurify';
+import DOMPurify from 'dompurify';
 import {css, html} from 'lit';
 import {classMap} from 'lit/directives/class-map.js';
 import {unsafeHTML} from 'lit/directives/unsafe-html.js';