Bump fastify from 3.29.1 to 3.29.4

Bumps [fastify](https://github.com/fastify/fastify) from 3.29.1 to 3.29.4.
- [Release notes](https://github.com/fastify/fastify/releases)
- [Commits](fastify/fastify@v3.29.1...v3.29.4)

---
updated-dependencies:
- dependency-name: fastify
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]