fix(sqlalchemy-bigquery): import WKT in system test_geography

Author: ohmayr

packages/sqlalchemy-bigquery/tests/system/test_geography.py

@@ -158,7 +158,7 @@ def test_geoalchemy2_orm(bigquery_dataset):
     from sqlalchemy import Column, Integer, String
     from sqlalchemy.ext.declarative import declarative_base
 
-    from sqlalchemy_bigquery import GEOGRAPHY
+    from sqlalchemy_bigquery import GEOGRAPHY, WKT
 
     Base = declarative_base()