upgrading package: jenkins 2.256 -> 2.257

jenkins/jenkins.spec

@@ -31,8 +31,8 @@ Distribution: OpenPKG Community
 Class:        EVAL
 Group:        Building
 License:      MIT
-Version:      2.256
-Release:      20200913
+Version:      2.257
+Release:      20200915
 
 #   list of sources
 Source0:      http://repo.jenkins-ci.org/public/org/jenkins-ci/main/jenkins-war/%{version}/jenkins-war-%{version}.war