Update to code-modernization

{
  "official": [
    {
      "name": "code-modernization",
      "author": {
        "name": "Anthropic",
        "email": "support@anthropic.com"
      },
      "source": "./plugins/code-modernization",
      "category": "development",
      "homepage": "https://github.com/anthropics/claude-plugins-official/tree/main/plugins/code-modernization",
      "description": "Guided modernization for any legacy codebase: start with /modernize, get an assessment, an interactive map, the business rules mined from the code, and a plan you approve, then an upgrade, a rewrite or a rebuild with independent proof that the new code behaves like the old. Includes security hardening, a one-page report, specialist agents, and an optional live progress pane (early access)."
    }
  ]
}