Fix typos. "Chat Maker" should be "Chat Marker"

xep-0333.xml

@@ -156,7 +156,7 @@
     <p>If the sender determines that the recipient's client supports the Chat Markers protocol then it MAY send a Chat Marker or markable message to that full JID.</p>
   </section2>
   <section2 topic='Chat Marker' anchor='when-chat-marker'>
-    <p>To prevent looping, an entity MUST NOT send a Chat Maker to mark up to a Chat Marker.</p>
+    <p>To prevent looping, an entity MUST NOT send a Chat Marker to mark up to a Chat Marker.</p>
   </section2>
 </section1>
 
@@ -211,7 +211,7 @@
   <p>Clients SHOULD use &xep0136; or &xep0313; to support offline updating of Chat Markers. Chat Markers SHOULD be archived, so they can be fetched and set regardless of whether the other users in a chat are online.</p>
   <p>Messages MUST have an 'id' to use Chat Markers.</p>
   <p>Messages MUST include the 'markable' element to use Chat Markers.</p>
-  <p>Chat Markers MUST only move forward. If a Chat Maker is received for an earlier message than the current Chat Marker, it MUST be ignored by the client.
+  <p>Chat Markers MUST only move forward. If a Chat Marker is received for an earlier message than the current Chat Marker, it MUST be ignored by the client.
   </p>
   <p>Chat Markers for unknown messages MUST be ignored by the client. A client MAY store the Chat Marker incase the associated message is retrieved later.
   </p>