fix: allow referrerpolicy on DOMPurify for YouTube

Author: dcshzj

src/services/utilServices/Sanitizer.ts

@@ -23,6 +23,7 @@ DOMPurify.setConfig({
     "marginwidth",
     "target",
     "async",
+    "referrerpolicy",
   ],
   // required in case <script> tag appears as the first line of the markdown
   FORCE_BODY: true,