fix: added missing import

Author: Gabriele Barcella

fattureincloud_python_sdk/models/issued_document_totals.py

@@ -23,6 +23,8 @@
 from typing import Optional, Set
 from typing_extensions import Self
 
+from fattureincloud_python_sdk.models.vat_item import VatItem
+
 
 class IssuedDocumentTotals(BaseModel):
     """