ci: escape regex dollar in Jenkins messages

jenkins/Jenkinsfile.production-database-import

@@ -57,7 +57,7 @@ pipeline {
             error('DATABASE 不能为空。')
           }
           if (!(params.DATABASE.trim() ==~ /^[a-z0-9]+(-[a-z0-9]+)*$/)) {
-            error("DATABASE 必须匹配 ^[a-z0-9]+(-[a-z0-9]+)*$: ${params.DATABASE}")
+            error("DATABASE 必须匹配 ^[a-z0-9]+(-[a-z0-9]+)*\$: ${params.DATABASE}")
           }
 
           def inputSource = params.INPUT_SOURCE?.trim()