Bump @fastify/formbody from 7.2.0 to 7.3.0

Bumps [@fastify/formbody](https://github.com/fastify/fastify-formbody) from 7.2.0 to 7.3.0.
- [Release notes](https://github.com/fastify/fastify-formbody/releases)
- [Commits](https://github.com/fastify/fastify-formbody/compare/v7.2.0...v7.3.0)