[platform-folders] Fix incorrect install location for .cmake file

[skogler]

Fixes find_package(platform_folders) not working anymore in recent versions (not sure when it stopped working though).

[x] Changes comply with the maintainer guide

• SHA512s are updated for each updated download
• The "supports" clause reflects platforms that may be fixed by this new version
• Any fixed CI baseline entries are removed from that file.
• Any patches that are no longer applied are deleted from the port's directory.
• The version database is fixed by rerunning ./vcpkg x-add-version --all and committing the result.
• Only one version is added to each modified port's versions file.

[Cheney-W]

Usage test passed with x64-linux triplet.