fixed installation guide in using CoreDNS for Service Discovery page

Author: PrashantDesale2004

content/en/docs/tasks/administer-cluster/coredns.md

@@ -32,7 +32,7 @@ that will deploy and upgrade the cluster for you.
 ## Installing CoreDNS
 
 For manual deployment or replacement of kube-dns, see the documentation at the
-[CoreDNS GitHub project.](https://github.com/coredns/deployment/tree/master/kubernetes)
+[CoreDNS GitHub project.](https://github.com/coredns/coredns.io/blob/master/content/manual/installation.md)
 
 ## Migrating to CoreDNS