minor #11846 Small typo (jschaedl)

This PR was merged into the 4.3 branch.

Discussion
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Small typo

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Commits
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5f0a603 Small typo

Author: javiereguiluz

messenger.rst

@@ -855,7 +855,7 @@ table_name          Name of the table                   messenger_messages
 queue_name          Name of the queue (a column in the  default
                     table, to use one table for
                     multiple transports)
-redeliver_timeout   Timeout before retrying a messages  3600
+redeliver_timeout   Timeout before retrying a message 3600
                     that's in the queue but in the
                     "handling" state (if a worker died
                     for some reason, this will occur,