fix(ci): inject current branch name in release tasks

Jenkinsfile

@@ -35,7 +35,7 @@ pipeline {
                         ])
                     ]) {
                         sh 'make .mktools'
-                        sh 'make gitea-release'
+                        sh "export MKT_PROJECT_VERSION_BRANCH_NAME=${env.BRANCH_NAME}; make gitea-release"
                     }
                 }
             }