style: 调整代码, 以防止造成误解.

调整 static 属性与 instance 属性的位置, 以防被视为纳入 instance 属性的一部分.

src/main/java/net/lamgc/oracle/sentry/script/groovy/GroovyTriggerProvider.java

@@ -16,13 +16,14 @@ import java.util.concurrent.ConcurrentHashMap;
  */
 public class GroovyTriggerProvider {
 
-    private final Map<String, ServiceLoader.Provider<GroovyTrigger>> triggerProviderMap = new ConcurrentHashMap<>();
-
     /**
      * Trigger Provider 唯一实例.
      */
     public final static GroovyTriggerProvider INSTANCE = new GroovyTriggerProvider();
 
+
+    private final Map<String, ServiceLoader.Provider<GroovyTrigger>> triggerProviderMap = new ConcurrentHashMap<>();
+
     private GroovyTriggerProvider() {
         ServiceLoader<GroovyTrigger> loader = ServiceLoader.load(GroovyTrigger.class);
         loader.stream().iterator().forEachRemaining(triggerProvider -> {