Add rel="noopener" to links to remote profiles (#19014)

* Update timeline_hint.js

* Update timeline_hint.js

app/javascript/mastodon/components/timeline_hint.js

@@ -6,7 +6,7 @@ const TimelineHint = ({ resource, url }) => (
   <div className='timeline-hint'>
     <strong><FormattedMessage id='timeline_hint.remote_resource_not_displayed' defaultMessage='{resource} from other servers are not displayed.' values={{ resource }} /></strong>
     <br />
-    <a href={url} target='_blank'><FormattedMessage id='account.browse_more_on_origin_server' defaultMessage='Browse more on the original profile' /></a>
+    <a href={url} target='_blank' rel='noopener'><FormattedMessage id='account.browse_more_on_origin_server' defaultMessage='Browse more on the original profile' /></a>
   </div>
 );