chore(deps): bump mcp-proxy-for-aws from 1.2.0 to 1.4.2 in /src/python (#1318)

Bumps [mcp-proxy-for-aws](https://github.com/aws/mcp-proxy-for-aws) from 1.2.0 to 1.4.2.
- [Release notes](https://github.com/aws/mcp-proxy-for-aws/releases)
- [Changelog](https://github.com/aws/mcp-proxy-for-aws/blob/main/CHANGELOG.md)
- [Commits](aws/mcp-proxy-for-aws@v1.2.0...v1.4.2)

---
updated-dependencies:
- dependency-name: mcp-proxy-for-aws
  dependency-version: 1.4.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]