Ignore the InstallerLocale if it is und

[SpecterShell]

Description of the new feature / enhancement

The InstallerLocale value of the package Qalculate.Qalculate was accidentally changed to und (unknown language) in the PR #159052, making it unable to update the package through WinGet (#195410). Trying to run winget upgrade Qalculate.Qalculate results in the following logs:

2024-12-01 11:28:55.787 [CLI ] Starting installer selection.
2024-12-01 11:28:55.787 [CLI ] Installer [X86,msi,Machine,und] not applicable: Installer locale does not match required locale: undRequired locales: [] Or does not satisfy compatible match for Preferred Locales: [zh-CN]
2024-12-01 11:28:55.787 [CLI ] Installer [X64,msi,Machine,und] not applicable: Installer locale does not match required locale: undRequired locales: [] Or does not satisfy compatible match for Preferred Locales: [zh-CN]
2024-12-01 11:28:55.787 [CLI ] Terminating context: 0x8a15002b at C:\__w\1\s\external\pkg\src\AppInstallerCLICore\Workflows\UpdateFlow.cpp:be

The und stands for "unknown language" and should be ignored.

Proposed technical implementation details

No response