Polish CoC link

Author: wilkinsona

CONTRIBUTING.adoc

@@ -5,7 +5,7 @@ Spring Boot is released under the Apache 2.0 license. If you would like to contr
 
 
 == Code of Conduct
-This project adheres to the Contributor Covenant link:CODE_OF_CONDUCT.adoc[code of conduct].
+This project adheres to the Contributor Covenant https://github.com/spring-projects/spring-boot?tab=coc-ov-file#[code of conduct].
 By participating, you are expected to uphold this code. Please report unacceptable behavior to [email protected].