typo

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@9111 d0543943-73ff-0310-b7d9-9358b9ac24b2

docs/phrase/phrase_en.xml

@@ -209,7 +209,7 @@
       <prompt phrase="to forward the recording to your email" filename="vm-forward_to_email.wav"/>
       <prompt phrase="greeting" filename="vm-greeting.wav"/>
       <prompt phrase="selected" filename="vm-selected.wav"/>
-      <prompt phrase="is not available" filename="vm-not_avaliable.wav"/>
+      <prompt phrase="is not available" filename="vm-not_available.wav"/>
       <prompt phrase="message number" filename="vm-message_number.wav"/>
       <prompt phrase="deleted" filename="vm-deleted.wav"/>
       <prompt phrase="in folder inbox" filename="vm-in_folder.wav"/>