Bump hono from 4.12.0 to 4.12.3 in /test/mcp (#298076)

Bumps [hono](https://github.com/honojs/hono) from 4.12.0 to 4.12.3.
- [Release notes](https://github.com/honojs/hono/releases)
- [Commits](https://github.com/honojs/hono/compare/v4.12.0...v4.12.3)

---
updated-dependencies:
- dependency-name: hono
  dependency-version: 4.12.3
  dependency-type: indirect
...

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