fix: asf site config file had the wrong yaml extension

[espy]

Overview

.asf.yml should have been .asf.yaml

Checklist

• I am not a bot
• This is my own work, I did not use AI, LLM's or similar technology for code or docs generation
• Code is written and works correctly
• Changes are covered by tests
• I modified the types to reflect the changes, if necessary
• Documentation changes were made in the docs folder