Bump @modelcontextprotocol/sdk from 1.20.2 to 1.21.1

Bumps [@modelcontextprotocol/sdk](https://github.com/modelcontextprotocol/typescript-sdk) from 1.20.2 to 1.21.1.
- [Release notes](https://github.com/modelcontextprotocol/typescript-sdk/releases)
- [Commits](modelcontextprotocol/typescript-sdk@1.20.2...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] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -43,7 +43,7 @@
   },
   "license": "MIT",
   "dependencies": {
-    "@modelcontextprotocol/sdk": "^1.20.2"
+    "@modelcontextprotocol/sdk": "^1.21.1"
   },
   "devDependencies": {
     "@types/node": "^20.19.25",