Bump sprig@latest

vendor/github.com/golang/protobuf/proto/extensions_test.go

@@ -40,6 +40,7 @@ import (
 
 	"github.com/golang/protobuf/proto"
 	pb "github.com/golang/protobuf/proto/testdata"
+	"golang.org/x/sync/errgroup"
 )
 
 func TestGetExtensionsWithMissingExtensions(t *testing.T) {
@@ -506,3 +507,30 @@ func TestClearAllExtensions(t *testing.T) {
 		t.Errorf("proto.HasExtension(%s): got true, want false", proto.MarshalTextString(m))
 	}
 }
+
+func TestMarshalRace(t *testing.T) {
+	// unregistered extension
+	desc := &proto.ExtensionDesc{
+		ExtendedType:  (*pb.MyMessage)(nil),
+		ExtensionType: (*bool)(nil),
+		Field:         101010100,
+		Name:          "emptyextension",
+		Tag:           "varint,0,opt",
+	}
+
+	m := &pb.MyMessage{Count: proto.Int32(4)}
+	if err := proto.SetExtension(m, desc, proto.Bool(true)); err != nil {
+		t.Errorf("proto.SetExtension(m, desc, true): got error %q, want nil", err)
+	}
+
+	var g errgroup.Group
+	for n := 3; n > 0; n-- {
+		g.Go(func() error {
+			_, err := proto.Marshal(m)
+			return err
+		})
+	}
+	if err := g.Wait(); err != nil {
+		t.Fatal(err)
+	}
+}