Fix: [AEA-5993] - Fix parameter name on policy (#2414)

## Summary

- Routine Change

### Details

Fix the parameter name value in the access policy on UpdatePrescriptions
lambda.

Signed-off-by: Connor Avery <214469360+connoravo-nhs@users.noreply.github.com>
Co-authored-by: tstephen-nhs <231503406+tstephen-nhs@users.noreply.github.com>

Author: connoravo-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}-TestPrescriptionsParameter1
-              - !Sub arn:aws:ssm:${AWS::Region}:${AWS::AccountId}:parameter/${StackName}-TestPrescriptionsParameter2
-              - !Sub arn:aws:ssm:${AWS::Region}:${AWS::AccountId}:parameter/${StackName}-TestPrescriptionsParameter3
-              - !Sub arn:aws:ssm:${AWS::Region}:${AWS::AccountId}:parameter/${StackName}-TestPrescriptionsParameter4
+              - !Sub arn:aws:ssm:${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
 
 
 Outputs: