v0.1.50

<!-- Release notes generated using configuration in .github/release.yml at v0.1.50 -->

What's Changed

• Bump actions/checkout from 4 to 5 by @dependabot[bot] in https://github.com/superfly/fly-go/pull/161
• add secrets field to LaunchMachineInput by @wjordan in https://github.com/superfly/fly-go/pull/160

Full Changelog: https://github.com/superfly/fly-go/compare/v0.1.49...v0.1.50