Update stats on the Nx Plugin Registry

[isaacplmann]

The Github Stars are not showing up for nx-yarn on the Nx Plugin Registry.

To fix this, you need to add a repository.url in the package.json that points to this repo. i.e.

{
  "repository": {
    "type": "git",
    "url": "https://github.com/nrwl/nx.git",
    "directory": "packages/web"
  }
}

Thanks,
Isaac (Nx Team)