Update to learning-output-style

{
  "official": [
    {
      "name": "learning-output-style",
      "author": {
        "name": "Anthropic",
        "email": "support@anthropic.com"
      },
      "source": "./plugins/learning-output-style",
      "category": "learning",
      "homepage": "https://github.com/anthropics/claude-plugins-public/tree/main/plugins/learning-output-style",
      "description": "Interactive learning mode that requests meaningful code contributions at decision points (mimics the unshipped Learning output style)"
    }
  ]
}