XEP-0384: fix typos

xep-0384.xml

@@ -107,7 +107,7 @@
       of inter-client history synchronization is achieved.
     </p>
     <p>
-      OMEMO currently uses version 3 SignalProtocol. Instead of an Signal key
+      OMEMO currently uses version 3 SignalProtocol. Instead of a Signal key
       server, &xep0163; (PEP) is used to publish key data.
     </p>
   </section2>
@@ -232,7 +232,7 @@
     <items node='eu.siacs.conversations.axolotl.bundles:31415'/>
   </pubsub>
 </iq>]]></example>
-    <p>A random preKeyPublic entry is selected, and used to build an SignalProtocol session.</p>
+    <p>A random preKeyPublic entry is selected, and used to build a SignalProtocol session.</p>
   </section2>
   <section2 topic='Sending a message' anchor='usecases-messagesend'>
     <p>