change aws_caller_identity ref (#1555)

terraform/etl/48-lambda-gov-notify-ingestion.tf

@@ -104,7 +104,7 @@ data "aws_iam_policy_document" "gov_notify_lambda_secret_access" {
       "secretsmanager:GetSecretValue",
     ]
     effect    = "Allow"
-    resources = ["arn:aws:secretsmanager:eu-west-2:${data.aws_caller_identity.current.account_id}:secret:housing/gov-notify*"]
+    resources = ["arn:aws:secretsmanager:eu-west-2:${data.aws_caller_identity.data_platform.account_id}:secret:housing/gov-notify*"]
   }
 }
 
@@ -118,4 +118,4 @@ resource "aws_iam_role_policy_attachment" "gov_notify_lambda_secret_access" {
   count      = local.is_live_environment && !local.is_production_environment ? 1 : 0
   role       = aws_iam_role.housing_gov_notify_ingestion[0].name
   policy_arn = aws_iam_policy.gov_notify_lambda_secret_access[0].arn
-}
+}