fix typo in document path for the proxy

roles/matrix-nginx-proxy/defaults/main.yml

@@ -11,7 +11,7 @@ matrix_nginx_proxy_docker_image_force_pull: "{{ matrix_nginx_proxy_docker_image.
 matrix_nginx_proxy_base_path: "{{ matrix_base_data_path }}/nginx-proxy"
 matrix_nginx_proxy_data_path: "{{ matrix_nginx_proxy_base_path }}/data"
 matrix_nginx_proxy_data_path_in_container: "/nginx-data"
-matrix_nginx_proxy_data_path_extension: "/matrix_domain"
+matrix_nginx_proxy_data_path_extension: "/matrix-domain"
 matrix_nginx_proxy_confd_path: "{{ matrix_nginx_proxy_base_path }}/conf.d"
 
 # List of systemd services that matrix-nginx-proxy.service depends on