Update query-json-files.md

Fixed grammar issue on line 59. Changed "Previous example uses full..." to "The previous example uses full..."

Author: kevinjpereira

articles/synapse-analytics/sql/query-json-files.md

@@ -56,7 +56,7 @@ The JSON document in the preceding sample query includes an array of objects. Th
 
 ### Data source usage
 
-Previous example uses full path to the file. As an alternative, you can create an external data source with the location that points to the root folder of the storage, and use that data source and the relative path to the file in the `OPENROWSET` function:
+The previous example uses full path to the file. As an alternative, you can create an external data source with the location that points to the root folder of the storage, and use that data source and the relative path to the file in the `OPENROWSET` function:
 
 ```sql
 create external data source covid