Updated schema to replace double type with decimal

one more fix

dataflow-website/batch-developer-guides/batch/batchsamples/billrun/src/main/resources/schema.sql

@@ -5,5 +5,5 @@ CREATE TABLE IF NOT EXISTS BILL_STATEMENTS
    last_name varchar(50),
    minutes int,
    data_usage int,
-   bill_amount double
+   bill_amount decimal(10,2)
 );

dataflow-website/batch-developer-guides/batch/batchsamples/billsetuptask/src/main/java/io/spring/billsetuptask/configuration/TaskConfiguration.java

@@ -38,7 +38,7 @@ public class TaskConfiguration {
 			JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource);
 			jdbcTemplate.execute("CREATE TABLE IF NOT EXISTS BILL_STATEMENTS ( id int, " +
 					"first_name varchar(50), last_name varchar(50), minutes int, " +
-					"data_usage int, bill_amount double)");
+					"data_usage int, bill_amount decimal(10,2))");
 		};
 	}
 }