feat：修复日志刷屏问题

Author: andrewshan

polaris-agent-core/plugins/dubbox/src/main/java/cn/polarismesh/agent/plugin/dubbox/polaris/PolarisRegistry.java

@@ -129,7 +129,7 @@ public void run() {
             List<?> instances = PolarisSingleton.getPolarisOperation().getAvailableInstances(service, null);
             if (null != instances) {
                 // 刷新invoker信息
-                LOGGER.info("[POLARIS] update instances count: {}, service: {}", instances.size(), service);
+                LOGGER.debug("[POLARIS] update instances count: {}, service: {}", instances.size(), service);
                 List<URL> urls = new ArrayList<>();
                 for (Object instance : instances) {
                     String host = PolarisSingleton.getPolarisOperation().getHost(instance);