fix: Vouchers import

Author: 1yam

src/aleph/sdk/client/http.py

@@ -38,6 +38,7 @@
 from aleph.sdk.client.services.instance import Instance
 from aleph.sdk.client.services.port_forwarder import PortForwarder
 from aleph.sdk.client.services.scheduler import Scheduler
+from aleph.sdk.client.services.voucher import Vouchers
 
 from ..conf import settings
 from ..exceptions import (
@@ -61,7 +62,6 @@
     safe_getattr,
 )
 from .abstract import AlephClient
-from .services.voucher import Vouchers
 
 logger = logging.getLogger(__name__)