Spring Cloud Config please consider changing the default label to main instead of master

as all github repos default to main now, I think it's safe to say its a prevailing wind if its not already 100%. With the default of master as it is, every out-of-the-box use of Spring Cloud Config breaks in inscrutable ways

Comment From: ryanjbaxter

Duplicate of https://github.com/spring-cloud/spring-cloud-config/issues/1722