Bump github.com/container-storage-interface/spec from 1.5.0 to 1.6.0

Bumps [github.com/container-storage-interface/spec](https://github.com/container-storage-interface/spec) from 1.5.0 to 1.6.0.
- [Release notes](https://github.com/container-storage-interface/spec/releases)
- [Commits](container-storage-interface/spec@v1.5.0...v1.6.0)

---
updated-dependencies:
- dependency-name: github.com/container-storage-interface/spec
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/IBM-Cloud/bluemix-go v0.0.0-20201019071904-51caa09553fb
 	github.com/IBM-Cloud/power-go-client v1.1.12
 	github.com/IBM/go-sdk-core/v5 v5.10.1
-	github.com/container-storage-interface/spec v1.5.0
+	github.com/container-storage-interface/spec v1.6.0
 	github.com/davecgh/go-spew v1.1.1
 	github.com/golang-jwt/jwt v3.2.2+incompatible
 	github.com/golang/glog v1.0.0

go.sum

@@ -154,8 +154,9 @@ github.com/cncf/xds/go v0.0.0-20211011173535-cb28da3451f1/go.mod h1:eXthEFrGJvWH
 github.com/cockroachdb/datadriven v0.0.0-20200714090401-bf6692d28da5/go.mod h1:h6jFvWxBdQXxjopDMZyH2UVceIRfR84bdzbkoKrsWNo=
 github.com/cockroachdb/errors v1.2.4/go.mod h1:rQD95gz6FARkaKkQXUksEje/d9a6wBJoCr5oaCLELYA=
 github.com/cockroachdb/logtags v0.0.0-20190617123548-eb05cc24525f/go.mod h1:i/u985jwjWRlyHXQbwatDASoW0RMlZ/3i9yJHE2xLkI=
-github.com/container-storage-interface/spec v1.5.0 h1:lvKxe3uLgqQeVQcrnL2CPQKISoKjTJxojEs9cBk+HXo=
 github.com/container-storage-interface/spec v1.5.0/go.mod h1:8K96oQNkJ7pFcC2R9Z1ynGGBB1I93kcS6PGg3SsOk8s=
+github.com/container-storage-interface/spec v1.6.0 h1:vwN9uCciKygX/a0toYryoYD5+qI9ZFeAMuhEEKO+JBA=
+github.com/container-storage-interface/spec v1.6.0/go.mod h1:8K96oQNkJ7pFcC2R9Z1ynGGBB1I93kcS6PGg3SsOk8s=
 github.com/containerd/cgroups v1.0.1/go.mod h1:0SJrPIenamHDcZhEcJMNBB85rHcUsw4f25ZfBiPYRkU=
 github.com/containerd/console v1.0.1/go.mod h1:XUsP6YE/mKtz6bxc+I8UiKKTP04qjQL4qcS3XoQ5xkw=
 github.com/containerd/console v1.0.2/go.mod h1:ytZPjGgY2oeTkAONYafi2kSj0aYggsf8acV1PGKCbzQ=