Bump @fastify/swagger from 7.5.1 to 7.6.0

Bumps [@fastify/swagger](https://github.com/fastify/fastify-swagger) from 7.5.1 to 7.6.0.
- [Release notes](https://github.com/fastify/fastify-swagger/releases)
- [Commits](https://github.com/fastify/fastify-swagger/compare/v7.5.1...v7.6.0)