[UI] Notifications for Backup are Labeled as Bucket.

### problem

For some reason, while I was doing Backup operations, the UI was telling me Bucket.

I hope it is just a labeling issue and not a logic issue.

ACS 4.22.0.1

### versions

The versions of ACS, hypervisors, storage, network etc..

### The steps to reproduce the bug

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### What to do about it?

_No response_

在 ACS 4.22.0.1 中重現備份操作，並將附加螢幕截圖中顯示的 UI 標籤與正在執行的操作進行比較。確認通知顯示的是「Backup」而不是「Bucket」，並驗證底層操作不受影響。

由索引模型根據 Issue 內容生成。