chore: remove personal email from config.yaml

Author: mme

infra-cdk/config.yaml

@@ -2,7 +2,7 @@ stack_name_base: langgraph-stack
 
 # Optional: Set to automatically create an admin user and email credentials
 # If not provided, you'll need to manually create users via AWS Console
-admin_user_email: markus.ecker@gmail.com
+admin_user_email:
 
 backend:
   pattern: langgraph-single-agent # Available patterns: strands-single-agent, langgraph-single-agent, claude-agent-sdk