Fix literal &lt/&gt in notifications
Fix literal &lt/&gt in notifications

Apparently I couldn't decide whether I was writing indexOf(...) > -1
or .includes()

Fixes https://github.com/vector-im/riot-web/issues/8230

vector-im/vector-web,vector-im/vector-web,vector-im/riot-web,vector-im/vector-web,vector-im/riot-web,vector-im/riot-web,vector-im/vector-web,vector-im/riot-web,vector-im/vector-web,vector-im/riot-web,vector-im/riot-web