feat(deps): bump github.com/google/go-containerregistry (#81)

Bumps [github.com/google/go-containerregistry](https://github.com/google/go-containerregistry) from 0.19.2 to 0.20.0.
- [Release notes](https://github.com/google/go-containerregistry/releases)
- [Changelog](https://github.com/google/go-containerregistry/blob/main/.goreleaser.yml)
- [Commits](https://github.com/google/go-containerregistry/compare/v0.19.2...v0.20.0)

---
updated-dependencies:
- dependency-name: github.com/google/go-containerregistry
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

go.mod

@@ -10,7 +10,7 @@ require (
 	github.com/distribution/reference v0.6.0
 	github.com/go-openapi/runtime v0.28.0
 	github.com/go-openapi/strfmt v0.23.0
-	github.com/google/go-containerregistry v0.19.2
+	github.com/google/go-containerregistry v0.20.0
 	github.com/hashicorp/go-cleanhttp v0.5.2
 	github.com/in-toto/in-toto-golang v0.9.0
 	github.com/open-policy-agent/opa v0.66.0