updated check tool to use helm 3 linting after PR is merged (#298)

Author: bitscuit

prow/cluster/jobs/IBM/ibm-platform-api-operator/IBM.ibm-platform-api-operator.master.yaml

@@ -68,7 +68,7 @@ postsubmits:
       - command:
         - make
         - check
-        image: quay.io/multicloudlab/check-tool:v20200817-b1f2b4c05
+        image: quay.io/multicloudlab/check-tool:v20201120-383f8da3c
         name: ""
         securityContext:
           privileged: true