nz-select: use nzOptions cant show label when label is number

[xiejay97]

Reproduction link

https://stackblitz.com/edit/angular-bgipsm?file=src/app/app.component.ts

Steps to reproduce

view

What is expected?

show label

What is actually happening?

cant show

Environment	Info
ng-zorro-antd	11.2.0
Browser	chrome

[xiejay97]

nz-option-item use interpolation

nzOptions set label by typeof item.label === 'string' ? item.label : null
pass number would be better, which often be use as label

[zorro-bot]

Hello @Xie-jay. We totally like your proposal/feedback, welcome to send us a Pull Request for it. Please fill the Pull Request Template here, provide documentation/test cases if needed and make sure CI passed, we will review it soon. Appreciate it advance and we are looking forward to your contribution!

你好 @Xie-jay, 我们完全同意你的提议/反馈，欢迎直接在此仓库 创建一个 Pull Request 来解决这个问题。请务必填写 Pull Request 内的预设模板，提供改动所需相应的测试用例、文档等，并确保 CI 通过，我们会尽快进行 Review，提前感谢和期待您的贡献！