Bump fastify from 4.5.3 to 4.6.0

Bumps [fastify](https://github.com/fastify/fastify) from 4.5.3 to 4.6.0.
- [Release notes](https://github.com/fastify/fastify/releases)
- [Commits](https://github.com/fastify/fastify/compare/v4.5.3...v4.6.0)