Add missing new line add the end of certificate.yml

Author: winem

roles/StackStorm.st2web/tasks/certificate.yml

@@ -68,4 +68,4 @@
     - not st2web_ssl_certificate
     - not st2web_ssl_certificate_key
     - ansible_os_family == 'RedHat'
-    - ansible_distribution_major_version == '7'
+    - ansible_distribution_major_version == '7'