Fix documentation typo (bug #904)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2063 65c4cc65-6c06-0410-ace0-fbb531ad65f3

doc/localchannel.txt

@@ -26,7 +26,7 @@ Examples:
 
 [inbound] ; here falls all incoming calls
 exten => s,1,Answer
-exten => s,2,Dial(local/200@internals,30,r)
+exten => s,2,Dial(local/200@internal,30,r)
 exten => s,3,Playback(sorrynoanswer)
 exten => s,4,Hangup