fixed YAML issue with templated reactor config

salt/files/master.d/reactor.conf

@@ -6,7 +6,7 @@
 reactor:
   {%- for reactor in reactors %}
     {%- for event_tag, reactor_files in reactor.items() %}
-  - '{{ event_tag }}'
+  - '{{ event_tag }}':
       {%- for reactor_file in reactor_files %}
     - {{ reactor_file }}
       {%- endfor %}