Bump fastify-metrics from 10.3.0 to 10.3.1

Bumps [fastify-metrics](https://github.com/SkeLLLa/fastify-metrics) from 10.3.0 to 10.3.1.
- [Release notes](https://github.com/SkeLLLa/fastify-metrics/releases)
- [Changelog](https://github.com/SkeLLLa/fastify-metrics/blob/master/docs/CHANGELOG.md)
- [Commits](https://github.com/SkeLLLa/fastify-metrics/compare/v10.3.0...v10.3.1)