Bump @modelcontextprotocol/sdk from 0.5.0 to 1.12.3 in /mcp

Bumps [@modelcontextprotocol/sdk](https://github.com/modelcontextprotocol/typescript-sdk) from 0.5.0 to 1.12.3.
- [Release notes](https://github.com/modelcontextprotocol/typescript-sdk/releases)
- [Commits](https://github.com/modelcontextprotocol/typescript-sdk/compare/0.5.0...1.12.3)

---
updated-dependencies:
- dependency-name: "@modelcontextprotocol/sdk"
  dependency-version: 1.12.3
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

mcp/package.json

@@ -9,7 +9,7 @@
     "dev": "node --watch server.js"
   },
   "dependencies": {
-    "@modelcontextprotocol/sdk": "^0.5.0"
+    "@modelcontextprotocol/sdk": "^1.12.3"
   },
   "keywords": ["mcp", "server"],
   "author": "",