message: Fix artifory README
diff: @@ -47,10 +47,10 @@ artifactory.cron=0 0/5 * * * *
  artifactory.servers[0]=https://www.jfrog.com/artifactory/
  # Artifactory user name (required)
  -artifactory.username=bobama
  +artifactory.usernames[0]=bobama
  # Artifactory api key (required)
  -artifactory.apiKey=s3cr3t
  +artifactory.apiKeys[0]=s3cr3t
  # The repo to collect artifacts from (required) - Can provide multiple (comma separated for each server)
  artifactory.repos[0]=prerelease,release
  