build(deps): bump github.com/rhysd/actionlint from 1.6.19 to 1.6.20 (#1371)

Bumps [github.com/rhysd/actionlint](https://github.com/rhysd/actionlint) from 1.6.19 to 1.6.20.
- [Release notes](https://github.com/rhysd/actionlint/releases)
- [Changelog](https://github.com/rhysd/actionlint/blob/main/CHANGELOG.md)
- [Commits](https://github.com/rhysd/actionlint/compare/v1.6.19...v1.6.20)

---
updated-dependencies:
- dependency-name: github.com/rhysd/actionlint
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

go.mod

@@ -20,7 +20,7 @@ require (
 	github.com/moby/buildkit v0.10.4
 	github.com/opencontainers/image-spec v1.0.3-0.20211202183452-c5a74bcca799
 	github.com/opencontainers/selinux v1.10.2
-	github.com/rhysd/actionlint v1.6.19
+	github.com/rhysd/actionlint v1.6.20
 	github.com/sabhiram/go-gitignore v0.0.0-20210923224102-525f6e181f06
 	github.com/sirupsen/logrus v1.9.0
 	github.com/spf13/cobra v1.5.0