Fix all media types in Accept header to match RFC

Fixes the media type to align with Accept HTTP header
RFC which specifies glob syntax */*

See https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html

Signed-off-by: Derek McGowan <derek@mcgstyle.net>

remotes/docker/resolver.go

@@ -155,7 +155,7 @@ func NewResolver(options ResolverOptions) remotes.Resolver {
 			images.MediaTypeDockerSchema2Manifest,
 			images.MediaTypeDockerSchema2ManifestList,
 			ocispec.MediaTypeImageManifest,
-			ocispec.MediaTypeImageIndex, "*"}, ", "))
+			ocispec.MediaTypeImageIndex, "*/*"}, ", "))
 	} else {
 		resolveHeader["Accept"] = options.Headers["Accept"]
 		delete(options.Headers, "Accept")