field type fix

Author: mykolalosev

examples/configservice/configurationaggregator.yaml

@@ -10,7 +10,7 @@ spec:
   forProvider:
     accountAggregationSource:
     - accountIds:
-      - ${data.aws_account_id}
+      - "${data.aws_account_id}"
       regions:
       - us-west-2
     region: us-west-1