Update to linear

{
  "official": [
    {
      "name": "linear",
      "source": "./external_plugins/linear",
      "category": "productivity",
      "homepage": "https://github.com/anthropics/claude-plugins-public/tree/main/external_plugins/linear",
      "description": "Linear issue tracking integration. Create issues, manage projects, update statuses, search across workspaces, and streamline your software development workflow with Linear's modern issue tracker."
    }
  ]
}