fix(mediaType): do not omit the original media type if not a well-kno…

…wn media type

While converting a media type to a human-friendly one, we omit the original
one when handling unknown media types. Usually, we convert
the media type when logging errors, so keeping the
original media type when reporting an error is important.
Signed-off-by: Aldo Lacuku <[email protected]>

pkg/oci/types.go

@@ -88,8 +88,8 @@ func HumanReadableMediaType(s string) string {
 		return string(Asset)
 	}
 
-	// should never happen
-	return ""
+	// If we do not have a match for a well known mediaType then we return the original mediaType.
+	return s
 }
 
 // ArtifactTypeSlice is a slice of ArtifactType, can be passed as comma separated values.