[hotfix][docs] Fix jar link for PolarDB-X doc. (#1012)

docs/content/quickstart/polardbx-tutorial.md

@@ -67,7 +67,7 @@ We can also visit [http://localhost:5601/](http://localhost:5601/) to see if Kib
 2. Download following JAR package required and put them under `flink-1.13.2/lib/`:
 
    **Download links are available only for stable releases, SNAPSHOT dependency need build by yourself. **
-    - [flink-sql-connector-mysql-cdc-2.3-SNAPSHOT.jar](https://repo1.maven.org/maven2/com/ververica/flink-connector-mysql-cdc/2.3-SNAPSHOT/flink-sql-connector-mysql-cdc-2.3-SNAPSHOT.jar)
+    - [flink-sql-connector-mysql-cdc-2.3-SNAPSHOT.jar](https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-mysql-cdc/2.3-SNAPSHOT/flink-sql-connector-mysql-cdc-2.3-SNAPSHOT.jar)
     - [flink-sql-connector-elasticsearch7_2.11-1.13.2.jar](https://repo.maven.apache.org/maven2/org/apache/flink/flink-sql-connector-elasticsearch7_2.11/1.13.2/flink-sql-connector-elasticsearch7_2.11-1.13.2.jar)
    
 ### Preparing data in databases

docs/content/快速上手/polardbx-tutorial-zh.md

@@ -109,7 +109,7 @@ VALUES (default, '2020-07-30 10:08:22', 'Jark', 50.50, 102, false),
 2. 下载下面列出的依赖包，并将它们放到目录 `flink-1.13.2/lib/` 下
 
 ```下载链接只对已发布的版本有效, SNAPSHOT 版本需要本地编译```
-- 用于订阅PolarDB-X Binlog: [flink-sql-connector-mysql-cdc-2.3-SNAPSHOT.jar](https://repo1.maven.org/maven2/com/ververica/flink-connector-mysql-cdc/2.3-SNAPSHOT/flink-sql-connector-mysql-cdc-2.3-SNAPSHOT.jar)
+- 用于订阅PolarDB-X Binlog: [flink-sql-connector-mysql-cdc-2.3-SNAPSHOT.jar](https://repo1.maven.org/maven2/com/ververica/flink-sql-connector-mysql-cdc/2.3-SNAPSHOT/flink-sql-connector-mysql-cdc-2.3-SNAPSHOT.jar)
 - 用于写入Elasticsearch: [flink-sql-connector-elasticsearch7_2.11-1.13.2.jar](https://repo.maven.apache.org/maven2/org/apache/flink/flink-sql-connector-elasticsearch7_2.11/1.13.2/flink-sql-connector-elasticsearch7_2.11-1.13.2.jar)
 3. 启动flink服务:
 ```shell