[zh-cn]sync volume-snapshots.md

Signed-off-by: xin.li <xin.li@daocloud.io>

content/zh-cn/docs/concepts/storage/volume-snapshots.md

@@ -117,6 +117,13 @@ Users need to be aware of the following when using this feature:
   来提供对卷快照的支持。详见 [CSI 驱动程序文档](https://kubernetes-csi.github.io/docs/)
 - Kubernetes 负责 CRD 和快照控制器的安装。
 
+<!--
+For advanced use cases, such as creating group snapshots of multiple volumes, see the external
+[CSI Volume Group Snapshot documentation](https://kubernetes-csi.github.io/docs/group-snapshot-restore-feature.html).
+-->
+对于高级用例，例如创建多个卷的组快照，请参阅外部
+[CSI 卷组快照文档](https://kubernetes-csi.github.io/docs/group-snapshot-restore-feature.html)。
+
 <!--
 ## Lifecycle of a volume snapshot and volume snapshot content