Bump picomatch from 4.0.3 to 4.0.4 in /test/mcp (#304949)

Bumps [picomatch](https://github.com/micromatch/picomatch) from 4.0.3 to 4.0.4.
- [Release notes](https://github.com/micromatch/picomatch/releases)
- [Changelog](https://github.com/micromatch/picomatch/blob/master/CHANGELOG.md)
- [Commits](https://github.com/micromatch/picomatch/compare/4.0.3...4.0.4)

---
updated-dependencies:
- dependency-name: picomatch
  dependency-version: 4.0.4
  dependency-type: indirect
...

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