Bump github.com/spf13/cobra from 1.1.3 to 1.2.1 (#1070)

Bumps [github.com/spf13/cobra](https://github.com/spf13/cobra) from 1.1.3 to 1.2.1.
- [Release notes](https://github.com/spf13/cobra/releases)
- [Changelog](https://github.com/spf13/cobra/blob/master/CHANGELOG.md)
- [Commits](spf13/cobra@v1.1.3...v1.2.1)

---
updated-dependencies:
- dependency-name: github.com/spf13/cobra
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

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

go.mod

@@ -21,7 +21,7 @@ require (
 	github.com/opencontainers/image-spec v1.0.1
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/sirupsen/logrus v1.8.1 // indirect
-	github.com/spf13/cobra v1.1.3
+	github.com/spf13/cobra v1.2.1
 	golang.org/x/net v0.0.0-20210525063256-abc453219eb5 // indirect
 	golang.org/x/oauth2 v0.0.0-20210514164344-f6687ab2804c
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c