Update jenkins file to use updated docker image (opensearch-project#104)

Signed-off-by: Sayali Gaikawad <[email protected]>

Author: gaiksaya

jenkins/release.jenkinsFile

@@ -4,6 +4,7 @@ lib = library(identifier: '[email protected]', retriever: modernSCM([
 ]))
 
 standardReleasePipelineWithGenericTrigger(
+    overrideDockerImage: 'opensearchstaging/ci-runner:release-centos7-clients-v4',
     tokenIdCredential: 'jenkins-sql-jdbc-generic-webhook-token',
     causeString: 'A tag was cut on opensearch-project/sql-jdbc repository causing this workflow to run',
     downloadReleaseAsset: true,