chore: update apps/emqx_gateway/i18n/emqx_gateway_api_authn_i18n.conf

Co-authored-by: Thales Macedo Garitezi <thalesmg@gmail.com>

apps/emqx_gateway/i18n/emqx_gateway_api_authn_i18n.conf

@@ -20,7 +20,7 @@ Returns 404 when gateway or authentication is not enabled."""
         desc {
             en: """Enables the authenticator for client authentication for the specified gateway. <\br>
 When the authenticator is not configured or turned off, all client connections are assumed to be allowed. <\br>
-Note: Adding only one authenticator is supported in the gateway, rather than allowing multiple authenticators to be configured to form an authentication chain as in MQTT."""
+Note: Only one authenticator is allowed to be enabled at a time in the gateway, rather than allowing multiple authenticators to be configured to form an authentication chain as in MQTT."""
             zh: """为指定网关开启认证器实现客户端认证的功能。<\br>
 当未配置认证器或关闭认证器时，则认为允许所有客户端的连接。<\br>
 注：在网关中仅支持添加一个认证器，而不是像 MQTT 一样允许配置多个认证器构成认证链。"""