[Doc][Improve] support chinese [docs/zh/connector-v2/source/OpenMldb.md] (#8710)

Author: mickeyzzm

docs/zh/connector-v2/source/OpenMldb.md

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+# OpenMldb
+
+> OpenMldb 源连接器
+
+## 描述
+
+用于从 OpenMldb 读取数据.
+
+## 关键特性
+
+- [x] [批处理](../../concept/connector-v2-features.md)
+- [x] [流处理](../../concept/connector-v2-features.md)
+- [ ] [精确一次](../../concept/connector-v2-features.md)
+- [x] [列投影](../../concept/connector-v2-features.md)
+- [ ] [并行度](../../concept/connector-v2-features.md)
+- [ ] [支持用户自定义分片](../../concept/connector-v2-features.md)
+
+## 选项
+
+|      名称           |  类型  | 必需 | 默认值 |
+|-----------------|---------|----------|---------------|
+| cluster_mode    | boolean | 是      | -             |
+| sql             | string  | 是      | -             |
+| database        | string  | 是      | -             |
+| host            | string  | 否       | -             |
+| port            | int     | 否       | -             |
+| zk_path         | string  | 否       | -             |
+| zk_host         | string  | 否       | -             |
+| session_timeout | int     | 否       | 10000         |
+| request_timeout | int     | 否       | 60000         |
+| common-options  |         | 否       | -             |
+
+### cluster_mode [string]
+
+OpenMldb 是否处于群集模式
+
+### sql [string]
+
+Sql 语句
+
+### database [string]
+
+数据库名称
+
+### host [string]
+
+OpenMldb主机，仅支持OpenMldb单模
+
+### port [int]
+
+OpenMldb端口，仅支持OpenMldb单模
+
+### zk_host [string]
+
+Zookeeper主机，仅在OpenMldb集群模式下受支持
+
+### zk_path [string]
+
+Zookeeper路径，仅在OpenMldb集群模式下受支持
+
+### session_timeout [int]
+
+OpenMldb会话超时（ms），默认值60000
+
+### request_timeout [int]
+
+OpenMldb请求超时（ms），默认值为10000
+
+### common options
+
+源插件常用参数, 详见 [Source Common Options](../source-common-options.md) 
+
+## 示例
+
+```hocon
+
+  OpenMldb {
+    host = "172.17.0.2"
+    port = 6527
+    sql = "select * from demo_table1"
+    database = "demo_db"
+    cluster_mode = false
+  }
+
+```
+