spectral-v10.21.0

• Bump jdx/mise-action from 4.0.1 to 4.1.0 in the all-actions group by @dependabot[bot] in https://github.com/prismatic-io/spectral/pull/491
• feat: add outputSchema to action definitions by @CaptainChemist in https://github.com/prismatic-io/spectral/pull/484

Full Changelog: https://github.com/prismatic-io/spectral/compare/spectral-v10.20.0...spectral-v10.21.0