doc/md: use fmt.Errorf instead of errors.Wrapf (#2608)

* Use fmt.Errorf instead of errors.Wrapf

* Update transactions.md

* Update transactions.md

doc/md/transactions.md

@@ -110,12 +110,12 @@ func WithTx(ctx context.Context, client *ent.Client, fn func(tx *ent.Tx) error)
 	}()
 	if err := fn(tx); err != nil {
 		if rerr := tx.Rollback(); rerr != nil {
-			err = errors.Wrapf(err, "rolling back transaction: %v", rerr)
+			err = fmt.Errorf("rolling back transaction: %w", rerr)
 		}
 		return err
 	}
 	if err := tx.Commit(); err != nil {
-		return errors.Wrapf(err, "committing transaction: %v", err)
+		return fmt.Errorf("committing transaction: %w", err)
 	}
 	return nil
 }