README: puppet refuses to parse class attributes as strings

[m8t]

Pull Request (PR) description

Fixes this kind of error:

Syntax error at 'global_config' (file: /etc/puppetlabs/code/environments/rsyslog/site/profile/manifests/rsyslog.pp, line: 5, column: 5)

     1  # Class: profile::rsyslog
     2  # By default provides client configuration, can optionally provide server configuration
     3  class profile::rsyslog {
     4    class { 'rsyslog::config':
     5      'global_config' => {}
     [...]

Also in this commit a minor typofix in REFERENCE.

[TheMeier]

The typo needs to be corrected here https://github.com/voxpupuli/puppet-rsyslog/blob/master/manifests/config.pp#L63 and the then the REFERENCE.md must be recreated using the rake task https://voxpupuli.org/docs/how_to_run_tests/#referencemd-update