docs(readme): fix GitHub Packages badge link (404)

Use the repo /packages tab URL; /pkgs/npm/... is not valid for this repository layout.

Author: AlbinoGeek

README.md

@@ -5,13 +5,13 @@
 [![GitHub release](https://img.shields.io/github/v/release/Rethunk-AI/mcp-multi-root-git?logo=github&label=release)](https://github.com/Rethunk-AI/mcp-multi-root-git/releases/latest)
 [![npm version](https://img.shields.io/npm/v/%40rethunk%2Fmcp-multi-root-git.svg)](https://www.npmjs.com/package/@rethunk/mcp-multi-root-git)
 [![npm downloads](https://img.shields.io/npm/dm/%40rethunk%2Fmcp-multi-root-git.svg?label=npm%20downloads)](https://www.npmjs.com/package/@rethunk/mcp-multi-root-git)
-[![GitHub Packages](https://img.shields.io/badge/github%20packages-%40rethunk--ai%2Fmcp--multi--root--git-24292f?logo=github)](https://github.com/Rethunk-AI/mcp-multi-root-git/pkgs/npm/mcp-multi-root-git)
+[![GitHub Packages](https://img.shields.io/badge/github%20packages-%40rethunk--ai%2Fmcp--multi--root--git-24292f?logo=github)](https://github.com/Rethunk-AI/mcp-multi-root-git/packages)
 [![License: MIT](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE)
 [![Node.js](https://img.shields.io/badge/node-%3E%3D22-339933.svg)](https://github.com/Rethunk-AI/mcp-multi-root-git/blob/main/package.json)
 
 Read-only **git** tools over MCP (status, multi-root inventory, `HEAD` parity, presets). **Install and MCP client wiring:** **[docs/install.md](docs/install.md)** only — do not duplicate those steps elsewhere.
 
-**Repository:** [github.com/Rethunk-AI/mcp-multi-root-git](https://github.com/Rethunk-AI/mcp-multi-root-git) · **npmjs (manual releases):** [`@rethunk/mcp-multi-root-git`](https://www.npmjs.com/package/@rethunk/mcp-multi-root-git) · **GitHub Packages (CI on each tag):** [`@rethunk-ai/mcp-multi-root-git`](https://github.com/Rethunk-AI/mcp-multi-root-git/pkgs/npm/mcp-multi-root-git) — see [docs/install.md](docs/install.md) and [HUMANS.md](HUMANS.md) Publishing.
+**Repository:** [github.com/Rethunk-AI/mcp-multi-root-git](https://github.com/Rethunk-AI/mcp-multi-root-git) · **npmjs (manual releases):** [`@rethunk/mcp-multi-root-git`](https://www.npmjs.com/package/@rethunk/mcp-multi-root-git) · **GitHub Packages (CI on each tag):** [`@rethunk-ai/mcp-multi-root-git`](https://github.com/Rethunk-AI/mcp-multi-root-git/packages) — see [docs/install.md](docs/install.md) and [HUMANS.md](HUMANS.md) Publishing.
 
 ## Documentation