Chore: [AEA-5993] - reference test prescription params by correct name (#2435)

## Summary

- 🤖 Operational or Infrastructure Change

### Details

-  reference test prescription params by correct name

Author: tstephen-nhs

SAMtemplates/parameters/main.yaml

@@ -160,10 +160,10 @@ Resources:
               - !Sub arn:aws:ssm:${AWS::Region}:${AWS::AccountId}:parameter/${StackName}-PSUNotifyApiBaseUrl
               - !Sub arn:aws:ssm:${AWS::Region}:${AWS::AccountId}:parameter/${StackName}-EnableNotificationsExternal
               - !Sub arn:aws:ssm:${AWS::Region}:${AWS::AccountId}:parameter/${StackName}-EnableNotificationsInternal
-              - !Sub arn:aws:ssm:${AWS::Region}:${AWS::AccountId}:parameter/${StackName}-TestPrescriptionsParameter_1
-              - !Sub arn:aws:ssm:${AWS::Region}:${AWS::AccountId}:parameter/${StackName}-TestPrescriptionsParameter_2
-              - !Sub arn:aws:ssm:${AWS::Region}:${AWS::AccountId}:parameter/${StackName}-TestPrescriptionsParameter_3
-              - !Sub arn:aws:ssm:${AWS::Region}:${AWS::AccountId}:parameter/${StackName}-TestPrescriptionsParameter_4
+              - !Sub arn:aws:ssm:${AWS::Region}:${AWS::AccountId}:parameter/${StackName}-TEST_PRESCRIPTIONS_1
+              - !Sub arn:aws:ssm:${AWS::Region}:${AWS::AccountId}:parameter/${StackName}-TEST_PRESCRIPTIONS_2
+              - !Sub arn:aws:ssm:${AWS::Region}:${AWS::AccountId}:parameter/${StackName}-TEST_PRESCRIPTIONS_3
+              - !Sub arn:aws:ssm:${AWS::Region}:${AWS::AccountId}:parameter/${StackName}-TEST_PRESCRIPTIONS_4
 
 
 Outputs: