Add missing dependency on concat from file

    Error: /File[/etc/foreman/settings.yaml]: Could not evaluate: Could not retrieve information from environment production source(s) file:/var/lib/puppet/concat/output/foreman_settings.out
    Notice: /Stage[main]/Foreman::Config/Concat_fragment[foreman_settings+01-header.yaml]/content: content changed '' to '--- ..... '
    Notice: /Stage[main]/Foreman::Config/Concat_build[foreman_settings]/target: *.yaml used for ordering