fix space before tab in indent

roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-synapse.conf.j2

@@ -168,7 +168,7 @@ server {
 					{% endif %}
 				}
 			{% endif %}
- 		{% endfor %}
+		{% endfor %}
 	{% endif %}
 
 	{# Everything else just goes to the API server ##}