build(deps): bump mcp in /ai/slackbot-mcp-client/no-auth

Bumps [mcp](https://github.com/modelcontextprotocol/python-sdk) from 2.1.0 to 2.1.1.
- [Release notes](https://github.com/modelcontextprotocol/python-sdk/releases)
- [Changelog](https://github.com/modelcontextprotocol/python-sdk/blob/main/RELEASE.md)
- [Commits](modelcontextprotocol/python-sdk@v2.1.0...v2.1.1)

---
updated-dependencies:
- dependency-name: mcp
  dependency-version: 2.1.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

ai/slackbot-mcp-client/no-auth/requirements.txt

@@ -1,5 +1,5 @@
 httpx2==2.12.0
-mcp==2.1.0
+mcp==2.1.1
 mypy==2.3.1
 pytest==9.1.1
 ruff==0.16.4