update vendor

vendor/github.com/google/go-containerregistry/pkg/name/ref.go

@@ -47,3 +47,30 @@ func ParseReference(s string, opts ...Option) (Reference, error) {
 	return nil, NewErrBadName("could not parse reference: " + s)
 
 }
+
+type stringConst string
+
+// MustParseReference behaves like ParseReference, but panics instead of
+// returning an error. It's intended for use in tests, or when a value is
+// expected to be valid at code authoring time.
+//
+// To discourage its use in scenarios where the value is not known at code
+// authoring time, it must be passed a string constant:
+//
+//    const str = "valid/string"
+//    MustParseReference(str)
+//    MustParseReference("another/valid/string")
+//    MustParseReference(str + "/and/more")
+//
+// These will not compile:
+//
+//    var str = "valid/string"
+//    MustParseReference(str)
+//    MustParseReference(strings.Join([]string{"valid", "string"}, "/"))
+func MustParseReference(s stringConst, opts ...Option) Reference {
+	ref, err := ParseReference(string(s), opts...)
+	if err != nil {
+		panic(err)
+	}
+	return ref
+}