chore(deps): bump dingtalk from 2.0.20 to 2.0.21

Bumps [dingtalk](https://github.com/aliyun/alibabacloud-sdk) from 2.0.20 to 2.0.21.
- [Release notes](https://github.com/aliyun/alibabacloud-sdk/releases)
- [Changelog](https://github.com/aliyun/alibabacloud-sdk/blob/master/ChangeLog-Go.txt)
- [Commits](https://github.com/aliyun/alibabacloud-sdk/commits)

---
updated-dependencies:
- dependency-name: com.aliyun:dingtalk
  dependency-type: direct:production
  update-type: version-update:semver-patch
...
Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -110,7 +110,7 @@
         <!-- dingtalk -->
         <alibaba-dingtalk-service-sdk.version>2.0.0</alibaba-dingtalk-service-sdk.version>
         <cube-sdk-java.version>1.0.2-RELEASE</cube-sdk-java.version>
-        <dingtalk.version>2.0.20</dingtalk.version>
+        <dingtalk.version>2.0.21</dingtalk.version>
 
         <!-- maven plugins -->
         <flatten-maven-plugin.version>1.5.0</flatten-maven-plugin.version>