Packages with invalid values

[sredna]

It's clear the manifest validation needs to be stricter here, it only makes sense for this value to start with % (%ProgramFiles%\MyApp etc)

• 2.46.240/Box.Box.installer.yaml sets DefaultInstallLocation: APPDIR:.
• 1.8.1/HP.HPCMSL.installer.yaml sets DefaultInstallLocation: '{code:GetProgramFiles}\WindowsPowerShell'
• 2.12.2/JFrog.Conan.installer.yaml sets DefaultInstallLocation: '{code:DefDirRoot}\Conan'
• 1.17.0/Ethereum.geth.installer.yaml sets DefaultInstallLocation: InstallDir
• 3.0.7/5rahim.Seanime.installer.yaml sets DefaultInstallLocation: placeholder\Seanime Desktop
• 2025.6.0/Yaak.app.installer.yaml sets DefaultInstallLocation: placeholder\Yaak
• 2025.3.1/Yaak.app.installer.yaml sets DefaultInstallLocation: placeholder\Yaak
• 2025.2.1/Yaak.app.installer.yaml sets DefaultInstallLocation: placeholder\Yaak

[SpecterShell]

@russellbanks

The 2nd and 3rd ones are related to russellbanks/Komac#1664