Fix schema

Author: akkomar

sql/moz-fx-data-shared-prod/accounts_backend_derived/monitoring_db_counts_v1/metadata.yaml

@@ -15,6 +15,6 @@ scheduling:
 bigquery:
   time_partitioning:
     type: day
-    field: submission_date
+    field: date
     require_partition_filter: false
     expiration_days: null