docs: fix log_rotation zh text indentation

apps/emqx_conf/i18n/emqx_conf_schema.conf

@@ -1459,11 +1459,10 @@ Each sink is represented by a _log handler_, which can be configured independent
 By default, the logs are stored in `./log` directory (for installation from zip file) or in `/var/log/emqx` (for binary installation).</br>
 This section of the configuration controls the number of files kept for each log handler.
 """
-      zh:
-        """
-        默认情况下，日志存储在 `./log` 目录（用于从 zip 文件安装）或 `/var/log/emqx`（用于二进制安装）。</br>
-        这部分配置，控制每个日志处理进程保留的文件数量。
-        """
+      zh: """
+默认情况下，日志存储在 `./log` 目录（用于从 zip 文件安装）或 `/var/log/emqx`（用于二进制安装）。</br>
+这部分配置，控制每个日志处理进程保留的文件数量。
+"""
     }
     label {
       en: "Log Rotation"