Add to_json for LE emails

Author: williampiv

templates/gitlab.rb.j2

@@ -21,7 +21,7 @@ nginx['ssl_certificate_key'] = "{{ gitlab_ssl_certificate_key }}"
 
 letsencrypt['enable'] = "{{ gitlab_letsencrypt_enable }}"
 {% if gitlab_letsencrypt %}
-letsencrypt['contact_emails'] = ["{{ gitlab_letsencrypt_contact_emails }}"]
+letsencrypt['contact_emails'] = ["{{ gitlab_letsencrypt_contact_emails | to_json }}"]
 letsencrypt['auto_renew_hour'] = "{{ gitlab_letsencrypt_auto_renew_hour }}"
 letsencrypt['auto_renew_minute'] = "{{ gitlab_letsencrypt_auto_renew_minute }}"
 letsencrypt['auto_renew_day_of_month'] = "{{ gitlab_letsencrypt_auto_renew_day_of_month }}"