Return an error wrapping ErrUnsupported

Per the documentation, this is a better practice

1 files changed, 1 insertions, 1 deletions

diff --git a/oae2.go b/oae2.go
index 05bc52d..c761d9c 100644
--- a/oae2.go
+++ b/oae2.go
@@ -382,7 +382,7 @@ func (r *Reader) seek(offset int64) (int64, error) {
 // io.Seeker, Seek returns [errors.ErrUnsupported].
 func (r *Reader) Seek(offset int64, whence int) (int64, error) {
 	if _, ok := r.r.r.(io.Seeker); !ok {
-		return 0, errors.ErrUnsupported
+		return 0, fmt.Errorf("%w", errors.ErrUnsupported)
 	}
 	if err := r.init(); err != nil {
 		return 0, err