update notice (#7939)

NOTICE

@@ -31,6 +31,32 @@ Also, please refer to each LICENSE.<component>.txt file, which is located in
 the 'license' directory of the distribution file, for the license terms of the
 components that this product depends on.
 
+------
+This product has a bundle Spring Framework:
+                            Spring Framework
+                            =================
+
+Please visit the git for more information:
+
+  * https://github.com/spring-projects/spring-framework.git
+
+Copyright 2002-2020 the original author or authors.
+
+The Spring Framework licenses this file to you under the Apache License,
+version 2.0 (the "License"); you may not use this file except in compliance
+with the License. You may obtain a copy of the License at:
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+License for the specific language governing permissions and limitations
+under the License.
+
+Also, please refer to each LICENSE.<component>.txt file, which is located in
+the 'license' directory of the distribution file, for the license terms of the
+components that this product depends on.
 
 ------
 com.alibaba.nacos.common.utils.InetAddressValidator.java in this product is