en,zh: BackupSchedule is not supported

Signed-off-by: liubo02 <liubo02@pingcap.com>

Author: liubog2008

en/v2-vs-v1.md

@@ -94,6 +94,10 @@ Deployment through CRD is not supported. You can use the built-in dashboard or d
 
 ### Features
 
+#### `BackupSchedule`
+
+Not supported yet.
+
 #### Cross-namespace deployment
 
 Not supported due to potential security issues and unclear user scenarios.

zh/v2-vs-v1.md

@@ -94,6 +94,10 @@ TiDB Operator v2 不再支持 `TidbMonitor` CRD。由于用户的监控系统通
 
 ### 功能
 
+#### `BackupSchedule`
+
+暂不支持 `BackupSchedule`。
+
 #### 跨 Namespace 部署
 
 考虑到跨 Namespace 可能带来的安全性问题以及尚不明确的用户场景，暂不支持。