v0.5.4

<!-- Release notes generated using configuration in .github/release.yml at v0.5.4 -->

What's Changed

• Move Fly-Force-Instance-Id to flaps requests by @dangra in https://github.com/superfly/fly-go/pull/230

Full Changelog: https://github.com/superfly/fly-go/compare/v0.5.3...v0.5.4