update badge link to wiki

Author: Crocmagnon

README.md

@@ -2,7 +2,7 @@
 
 [![Go Reference](https://pkg.go.dev/badge/github.com/Crocmagnon/fatcontext.svg)](https://pkg.go.dev/github.com/Crocmagnon/fatcontext)
 [![Go Report Card](https://goreportcard.com/badge/github.com/Crocmagnon/fatcontext)](https://goreportcard.com/report/github.com/Crocmagnon/fatcontext)
-[![Go Coverage](https://github.com/Crocmagnon/fatcontext/wiki/coverage.svg)](https://raw.githack.com/wiki/Crocmagnon/fatcontext/coverage.html)
+[![Go Coverage](https://github.com/Crocmagnon/fatcontext/wiki/coverage.svg)](https://github.com/Crocmagnon/fatcontext/wiki/Coverage)
 
 `fatcontext` is a Go linter which detects potential fat contexts in loops or function literals.
 They can lead to performance issues, as documented here: https://gabnotes.org/fat-contexts/