put owner with public view functions

contracts/beacon/Voucher.sol

@@ -246,14 +246,6 @@ contract Voucher is Initializable, IVoucher {
         emit TaskClaimedWithVoucher(taskId);
     }
 
-    /**
-     * @dev Returns the address of the current owner.
-     */
-    function owner() public view returns (address) {
-        VoucherStorage storage $ = _getVoucherStorage();
-        return $._owner;
-    }
-
     /**
      * Retrieve the expiration timestamp of the voucher.
      * @return expirationTimestamp The expiration timestamp.
@@ -298,6 +290,14 @@ contract Voucher is Initializable, IVoucher {
         return $._sponsoredAmounts[dealId];
     }
 
+    /**
+     * @dev Returns the address of the current owner.
+     */
+    function owner() public view returns (address) {
+        VoucherStorage storage $ = _getVoucherStorage();
+        return $._owner;
+    }
+
     /**
      * Retrieve the address of the voucher hub associated with the voucher.
      * @return voucherHubAddress The address of the voucher hub.