Update SUMMARY.md

Author: qibaoguang

SUMMARY.md

@@ -373,3 +373,10 @@
          * [74.3. 将现有的应用转换为Spring Boot](IX. ‘How-to’ guides/74.3. Convert an existing application to Spring Boot.md)
          * [74.4. 部署WAR到Weblogic](IX. ‘How-to’ guides/74.4. Deploying a WAR to Weblogic.md)
          * [74.5. 部署WAR到老的(Servlet2.5)容器](IX. ‘How-to’ guides/74.5. Deploying a WAR in an Old (Servlet 2.5) Container.md)
+* [X.附录](X. Appendices/README.md)
+   * [附录A. 常见应用属性](X. Appendices/A. Common application properties.md) 
+   * [附录B. 配置元数据](X. Appendices/B. Configuration meta-data.md)
+      * [附录B.1. 元数据格式](X. Appendices/B.1. Meta-data format.md)
+         * [附录B.1.1. Group属性](X. Appendices/B.1.1. Group Attributes.md)
+         * [附录B.1.2. Property属性](X. Appendices/B.1.2. Property Attributes.md)
+         * [附录B.1.3. 可重复的元数据节点](X. Appendices/B.1.3. Repeated meta-data items.md)