Update content of files

data/web/corefork.telegram.org/api/layers.html

@@ -59,7 +59,9 @@
 <a href="/api/bots/webapps#simple-web-apps">Web apps</a> can now be opened by clicking on a <code>switch_webview</code> inline result, similar to <code>switch_pm</code> inline results.<br>
 Bots can now edit their own about text and description.<br>
 Also, the <a href="/api/auth#future-auth-tokens">future auth token</a> is now directly returned in the <a href="/constructor/config">config</a> constructor, which was also cleaned up to remove redundant information already contained in the <a href="/api/config#client-configuration">appConfig configuration</a>.<br>
-Made some further </p>
+<a href="/method/messages.getMessageReadParticipants">messages.getMessageReadParticipants</a> now returns a timestamp for each user, indicating when that user has read the specified message.  </p>
+<p>Additionally, when using <a href="/method/messages.addChatUser">messages.addChatUser</a>, <a href="/method/channels.inviteToChannel">channels.inviteToChannel</a> or <a href="/method/messages.createChat">messages.createChat</a>, 0-N updates of type <a href="/constructor/updateGroupInvitePrivacyForbidden">updateGroupInvitePrivacyForbidden</a> may be returned, indicating that the server couldn't add a user to a chat because of their privacy settings; if required, an <a href="/api/invites">invite link</a> can be shared with the user, instead.</p>
+<p>Finally, sponsored messages can now contain detailed info about the sponsor of the message or the message itself.</p>
 <h4><a class="anchor" href="#schema-changes" id="schema-changes" name="schema-changes"><i class="anchor-icon"></i></a>Schema changes</h4>
 <h5><a class="anchor" href="#new-methods" id="new-methods" name="new-methods"><i class="anchor-icon"></i></a>New Methods</h5>
 <ul>