Bump github.com/go-openapi/strfmt from 0.21.3 to 0.21.7

Bumps [github.com/go-openapi/strfmt](https://github.com/go-openapi/strfmt) from 0.21.3 to 0.21.7.
- [Release notes](https://github.com/go-openapi/strfmt/releases)
- [Commits](https://github.com/go-openapi/strfmt/compare/v0.21.3...v0.21.7

)

---
updated-dependencies:
- dependency-name: github.com/go-openapi/strfmt
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>