Update mod.sql

Author: perrysk-msft

samples/features/in-memory/iot-smart-grid/Db/Storage/mod.sql

@@ -1,3 +1,3 @@
---ALTER DATABASE [$(DatabaseName)]
---    ADD FILEGROUP [mod] CONTAINS MEMORY_OPTIMIZED_DATA;
+ALTER DATABASE [$(DatabaseName)]
+  ADD FILEGROUP [mod] CONTAINS MEMORY_OPTIMIZED_DATA;