updated bootstrap-discovery link

Author: kundan2707

staging/src/k8s.io/cluster-bootstrap/README.md

@@ -1,7 +1,7 @@
 # cluster-bootstrap
 
 Set of constants and helpers in support of
-https://github.com/kubernetes/community/blob/master/contributors/design-proposals/cluster-lifecycle/bootstrap-discovery.md
+https://github.com/kubernetes/design-proposals-archive/blob/main/cluster-lifecycle/bootstrap-discovery.md
 
 
 ## Purpose