fix(syndic.sls): fix `salt-lint` errors

```bash
Examining salt/syndic.sls of type state
[201] Trailing whitespace
salt/syndic.sls:12
  {%- endif %}
```

salt/syndic.sls

@@ -9,7 +9,7 @@ salt-syndic:
     - name: {{ salt_settings.salt_syndic }}
   {%- if salt_settings.version is defined %}
     - version: {{ salt_settings.version }}
-  {%- endif %}    
+  {%- endif %}
     - require_in:
       - service: salt-syndic
     - watch_in: