Bump fastify from 3.14.2 to 3.15.0 (#41)

Bumps [fastify](https://github.com/fastify/fastify) from 3.14.2 to 3.15.0.
- [Release notes](https://github.com/fastify/fastify/releases)
- [Commits](fastify/fastify@v3.14.2...v3.15.0)

Signed-off-by: dependabot[bot] <support@github.com>

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