修复JsParserExecutor DCL模式缺少volatile：EXECUTOR字段添加volatile保证多线程可见性

parser/src/main/java/cn/qaiu/parser/customjs/JsParserExecutor.java

@@ -33,7 +33,7 @@ public class JsParserExecutor implements IPanTool, AutoCloseable {
 
     private static final Logger log = LoggerFactory.getLogger(JsParserExecutor.class);
 
-    private static WorkerExecutor EXECUTOR;
+    private static volatile WorkerExecutor EXECUTOR;
     private static final Object EXECUTOR_LOCK = new Object();
 
     private static String FETCH_RUNTIME_JS = null;