[Package Issue]: Microsoft.PowerShell.Preview v7.6.0-preview.6 is not yet avaliable, while msi is already there..

Nobody has claimed this yet.

### Please confirm these before moving forward

- [x] I have searched for my issue and not found a work-in-progress/duplicate/resolved issue.
- [x] I have not been informed if the issue is resolved in a preview version of the winget client.

### Category of the issue

No applicable update found.

### Brief description of your issue

PowerShell 7.6.0-preview.5

A new PowerShell preview release is available: v7.6.0-preview.6
Upgrade now, or check out the release page at:
https://aka.ms/PowerShell-Release?tag=v7.6.0-preview.6

PS C:\Users\calvi> winget install --id Microsoft.PowerShell.Preview --source winget
Found an existing package already installed. Trying to upgrade the installed package...
No available upgrade found.
No newer package versions are available from the configured sources.
PS C:\Users\calvi> winget preview
Windows Package Manager v1.12.440

### Steps to reproduce

winget install --id Microsoft.PowerShell.Preview --source winget

### Actual behavior

Found an existing package already installed. Trying to upgrade the installed package...
No available upgrade found.
No newer package versions are available from the configured sources.

### Expected behavior

Able to update to latest preview.

### Environment

```raw
PS C:\Users\calvi> winget --info
Windows Package Manager v1.12.440
Copyright (c) Microsoft Corporation. All rights reserved.

Windows: Windows.Desktop v10.0.28020.1362
System Architecture: X64
Package: Microsoft.DesktopAppInstaller v1.27.440.0

Winget Directories
-----------------------------------------------------------------------------------------------------------------------
Logs %LOCALAPPDATA%\Packages\Microsoft.DesktopAppInstaller_8wekyb3d8bbwe\LocalState\Diag…
User Settings %LOCALAPPDATA%\Packages\Microsoft.DesktopAppInstaller_8wekyb3d8bbwe\LocalState\sett…
Portable Links Directory (User) %LOCALAPPDATA%\Microsoft\WinGet\Links
Portable Links Directory (Machine) C:\Program Files\WinGet\Links
Portable Package Root (User) %LOCALAPPDATA%\Microsoft\WinGet\Packages
Portable Package Root C:\Program Files\WinGet\Packages
Portable Package Root (x86) C:\Program Files (x86)\WinGet\Packages
Installer Downloads %USERPROFILE%\Downloads
Configuration Modules %LOCALAPPDATA%\Microsoft\WinGet\Configuration\Modules

Links
---------------------------------------------------------------------------
Privacy Statement https://aka.ms/winget-privacy
License Agreement https://aka.ms/winget-license
Third Party Notices https://aka.ms/winget-3rdPartyNotice
Homepage https://aka.ms/winget
Windows Store Terms https://www.microsoft.com/en-us/storedocs/terms-of-sale

Admin Setting State
--------------------------------------------------
LocalManifestFiles Disabled
BypassCertificatePinningForMicrosoftStore Disabled
InstallerHashOverride Disabled
LocalArchiveMalwareScanOverride Disabled
ProxyCommandLineOptions Disabled
DefaultProxy Disabled
```

### Screenshots and Logs

_No response_

Start with the reported `winget install --id Microsoft.PowerShell.Preview --source winget` command and inspect the package entry for Microsoft.PowerShell.Preview against the v7.6.0-preview.6 release information linked in the issue. Confirm why the MSI is available but the package is not, then verify that the command offers the expected preview upgrade.

Written by the indexing model from the issue text.