[ISSUE #4993] Polish the documents for mq Dledger Quick Deployment (#4994)

docs/cn/dledger/quick_start.md

@@ -11,33 +11,36 @@
 
 #### 1.1 构建 DLedger
 
-`git clone https://github.com/openmessaging/dledger.git`
-
-`cd dledger`
-
-`mvn clean install -DskipTests`
+```shell
+$ git clone https://github.com/openmessaging/dledger.git
+$ cd dledger
+$ mvn clean install -DskipTests
+```
 
 #### 1.2 构建 RocketMQ
 
-`git clone https://github.com/apache/rocketmq.git`
-
-`cd rocketmq`
-
-`git checkout -b store_with_dledger origin/store_with_dledger`
-
-`mvn -Prelease-all -DskipTests clean install -U`
+```shell
+$ git clone https://github.com/apache/rocketmq.git
+$ cd rocketmq
+$ git checkout -b store_with_dledger origin/store_with_dledger
+$ mvn -Prelease-all -DskipTests clean install -U
+```
 
 ### 2. 快速部署
 
 在构建成功后
 
-`cd distribution/target/apache-rocketmq`
-
-`sh bin/dledger/fast-try.sh start`
+```shell
+#{rocketmq-version} replace with rocketmq actual version. example: 5.0.0-SNAPSHOT
+$ cd distribution/target/rocketmq-{rocketmq-version}/rocketmq-{rocketmq-version}
+$ sh bin/dledger/fast-try.sh start
+```
 
 如果上面的步骤执行成功，可以通过 mqadmin 运维命令查看集群状态。
 
-`sh bin/mqadmin clusterList -n 127.0.0.1:9876`
+```shell
+$ sh bin/mqadmin clusterList -n 127.0.0.1:9876
+```
 
 顺利的话，会看到如下内容：
 
@@ -49,7 +52,9 @@
 
 关闭快速集群，可以执行：
 
-`sh bin/dledger/fast-try.sh stop`
+```shell
+$ sh bin/dledger/fast-try.sh stop
+```
 
 快速部署，默认配置在 conf/dledger 里面，默认的存储路径在 /tmp/rmqstore。