Updating database parameter name. Version upgrade seems to have changed it.

Author: EC2 Default User

lib/baseline-stack.ts

@@ -82,8 +82,8 @@ export class BaselineStack extends cdk.Stack {
             engine: rds.DatabaseInstanceEngine.POSTGRES,
             masterUsername: 'master',
             vpc: baselineVpc,
-            vpcPlacement: appSubnetSelection,
-            instanceClass: ec2.InstanceType.of(ec2.InstanceClass.BURSTABLE2, ec2.InstanceSize.SMALL),
+            vpcPlacement: appSubnetSelection, 
+            instanceType: ec2.InstanceType.of(ec2.InstanceClass.BURSTABLE2, ec2.InstanceSize.SMALL),
             instanceIdentifier: 'chembl-25-00',
             masterUserPassword: chemblDBSecret.secretValueFromJson('password'),
             securityGroups: [chemblDbSG],