HIVE-28629: hive-precommit job runs shows that precommit runs on exte…

…rnal repository's Jenkinsfile - trying to upgrade dind

Jenkinsfile

@@ -138,7 +138,7 @@ def hdbPodTemplate(closure) {
             envVar(key: 'DOCKER_HOST', value: 'tcp://localhost:2375')
         ]
     ),
-    containerTemplate(name: 'dind', image: 'docker:18.05-dind',
+    containerTemplate(name: 'dind', image: 'docker:20.10-dind',
         alwaysPullImage: true,
         privileged: true,
     ),