fixed typo

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@13112 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/resources/hudson/model/Messages.properties

@@ -82,7 +82,7 @@ Job.NoRecentBuildFailed=No recent builds failed.
 Job.Pronoun=Project
 Job.minutes=mins
 
-Queue.AllNodesOffline=All nodes of label ''{0}'' is offline
+Queue.AllNodesOffline=All nodes of label ''{0}'' are offline
 Queue.BlockedBy=Blocked by {0}
 Queue.InProgress=A build is already in progress
 Queue.InQuietPeriod=In the quiet period. Expires in {0}