apps/app_queue - Fix incorrect Macro parameter documentation

Macro is executed on the called channel, not the calling channel.

(closes issue ASTERISK-23069)
Reported By: Bryan Anderson
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Merged revisions 408447 from http://svn.asterisk.org/svn/asterisk/branches/1.8


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@408448 65c4cc65-6c06-0410-ace0-fbb531ad65f3