[request] mention `/S` flag for setup.exe installer in Microsoft Store guide

### Question you want answered

https://github.com/orgs/tauri-apps/discussions/14689

### Where did you look for an answer?

.

### Page URL

https://v2.tauri.app/distribute/microsoft-store/

### Additional context

_No response_

### Are you willing to work on this yourself?

- [ ] I want to work on this myself