The File naming convention section for WinGet configuration files mentions this:
The convention for naming a WinGet Configuration file is using the ".winget" file extension (like configuration.winget). For Git-based projects the default configuration should be stored in a ".config" directory at: ./config/configuration.winget. In some cases, more than one configuration file may be appropriate given different toolchains or user preferences. Those additional configuration files should also be located in the ".config" directory.
https://learn.microsoft.com/en-us/windows/package-manager/configuration/create?source=docs#file-naming-convention
It is unclear, if the folder should be .config or config based on the sample directory name.
Should the correct directory name in the sample be ./.config/configuration.winget?