Bump github.com/opencontainers/go-digest from 1.0.0-rc1 to 1.0.0

Bumps [github.com/opencontainers/go-digest](https://github.com/opencontainers/go-digest) from 1.0.0-rc1 to 1.0.0.
- [Release notes](https://github.com/opencontainers/go-digest/releases)
- [Commits](https://github.com/opencontainers/go-digest/compare/v1.0.0-rc1...v1.0.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

go.mod

@@ -33,7 +33,7 @@ require (
 	github.com/hashicorp/go-multierror v1.1.0
 	github.com/morikuni/aec v1.0.0 // indirect
 	github.com/onsi/gomega v1.9.0
-	github.com/opencontainers/go-digest v1.0.0-rc1
+	github.com/opencontainers/go-digest v1.0.0
 	github.com/opencontainers/image-spec v1.0.1 // indirect
 	github.com/opencontainers/runc v0.1.1 // indirect
 	github.com/pkg/errors v0.9.1

go.sum

@@ -212,6 +212,8 @@ github.com/onsi/gomega v1.9.0 h1:R1uwffexN6Pr340GtYRIdZmAiN4J+iw6WG4wog1DUXg=
 github.com/onsi/gomega v1.9.0/go.mod h1:Ho0h+IUsWyvy1OpqCwxlQ/21gkhVunqlU8fDGcoTdcA=
 github.com/opencontainers/go-digest v1.0.0-rc1 h1:WzifXhOVOEOuFYOJAW6aQqW0TooG2iki3E3Ii+WN7gQ=
 github.com/opencontainers/go-digest v1.0.0-rc1/go.mod h1:cMLVZDEM3+U2I4VmLI6N8jQYUd2OVphdqWwCJHrFt2s=
+github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
+github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
 github.com/opencontainers/image-spec v1.0.1 h1:JMemWkRwHx4Zj+fVxWoMCFm/8sYGGrUVojFA6h/TRcI=
 github.com/opencontainers/image-spec v1.0.1/go.mod h1:BtxoFyWECRxE4U/7sNtV5W15zMzWCbyJoFRP3s7yZA0=
 github.com/opencontainers/runc v0.1.1 h1:GlxAyO6x8rfZYN9Tt0Kti5a/cP41iuiO2yYT0IJGY8Y=