[nsync] Update to 1.28.1

[luncliff]

Changes

Use the updated version which uses install(EXPORT) in CMakeLists.txt

find_package(nsync CONFIG)
find_package(nsync_cpp CONFIG)

References

• https://github.com/google/nsync/releases/tag/1.28.1

Triplet Support

• x64-windows
• x64-linux
• x64-osx

Configuration

"vcpkg-configuration.json" changes for the release.

{
    "registries": [
        {
            "kind": "git",
            "repository": "https://github.com/luncliff/vcpkg-registry",
            "packages": [
                "nsync"
            ],
            "baseline": "..."
        }
    ]
}