fix json error in metadata.json
fix json error in metadata.json

This is wrong in the last tagged release, but I'm not doing another relase since
it doesn't really matter.

purplehazech/puppet-syslogng,Elefrancois/puppet-syslogng,talis/puppet-syslogng,talis/puppet-syslogng,omarqureshi/puppet-syslogng,omarqureshi/puppet-syslogng,Elefrancois/puppet-syslogng,purplehazech/puppet-syslogng