chore(deps): bump @modelcontextprotocol/sdk from 1.13.2 to 1.21.1

Bumps [@modelcontextprotocol/sdk](https://github.com/modelcontextprotocol/typescript-sdk) from 1.13.2 to 1.21.1.
- [Release notes](https://github.com/modelcontextprotocol/typescript-sdk/releases)
- [Commits](modelcontextprotocol/typescript-sdk@1.13.2...1.21.1)

---
updated-dependencies:
- dependency-name: "@modelcontextprotocol/sdk"
  dependency-version: 1.21.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -90,6 +90,6 @@
     "typescript": "^5.6.3"
   },
   "dependencies": {
-    "@modelcontextprotocol/sdk": "^1.13.2"
+    "@modelcontextprotocol/sdk": "^1.21.1"
   }
 }