adjust indent

Author: Riskey

zh/self-host/troubleshooting/storage-and-migration.mdx

@@ -94,7 +94,7 @@ title: 存储与迁移
 
 2. **从存储中删除孤立文件**
    ```bash
-    docker exec -it docker-api-1 flask remove-orphaned-files-on-storage
+   docker exec -it docker-api-1 flask remove-orphaned-files-on-storage
    # 使用 -f 标志跳过确认
    ```