Add missing ref (#1280)

This PR fixes a deployment issue in #1277 caused by a missing '!Ref'.

Author: xschildw

org-formation/600-access/_tasks.yaml

@@ -396,7 +396,7 @@ SynapseLlmDeveloperPolicy:
   DefaultOrganizationBinding:
     IncludeMasterAccount: true
     Account:
-      - SynapseLlmProdAccount
+      - !Ref SynapseLlmProdAccount
     Region: !Ref primaryRegion
   Parameters:
     PolicyDocument: >-