Bump fastify from 2.13.0 to 2.15.1
Bump fastify from 2.13.0 to 2.15.1

Bumps [fastify](https://github.com/fastify/fastify) from 2.13.0 to 2.15.1.
- [Release notes](https://github.com/fastify/fastify/releases)
- [Commits](https://github.com/fastify/fastify/compare/v2.13.0...v2.15.1)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
SaulDoesCode/rilti.js,SaulDoesCode/rot.js