chore(deps): Bump @modelcontextprotocol/sdk from 1.21.0 to 1.21.1 (#1267)

Bumps [@modelcontextprotocol/sdk](https://github.com/modelcontextprotocol/typescript-sdk) from 1.21.0 to 1.21.1.
- [Release notes](https://github.com/modelcontextprotocol/typescript-sdk/releases)
- [Commits](modelcontextprotocol/typescript-sdk@1.21.0...1.21.1)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pnpm-lock.yaml

@@ -22,7 +22,7 @@
   },
   "dependencies": {
     "@langchain/mcp-adapters": "^0.6.0",
-    "@modelcontextprotocol/sdk": "^1.21.0",
+    "@modelcontextprotocol/sdk": "^1.21.1",
     "@langchain/langgraph": "^0.4.9",
     "langchain": "0.3.36",
     "@langchain/core": "0.3.79",