Add noopener and/or noreferrer (#12202)

app/javascript/mastodon/features/ui/components/boost_modal.js

@@ -61,7 +61,7 @@ class BoostModal extends ImmutablePureComponent {
           <div className='status light'>
             <div className='boost-modal__status-header'>
               <div className='boost-modal__status-time'>
-                <a href={status.get('url')} className='status__relative-time' target='_blank' rel='noopener'><RelativeTimestamp timestamp={status.get('created_at')} /></a>
+                <a href={status.get('url')} className='status__relative-time' target='_blank' rel='noopener noreferrer'><RelativeTimestamp timestamp={status.get('created_at')} /></a>
               </div>
 
               <a onClick={this.handleAccountClick} href={status.getIn(['account', 'url'])} className='status__display-name'>