Modified the message that only top level approvers can change blocker…

… labels (#3647)

Signed-off-by: Anish Bista <[email protected]>

external-plugins/release-blocker/server.go

@@ -324,7 +324,7 @@ func (s *Server) handleIssueComment(l *logrus.Entry, ic github.IssueCommentEvent
 
 	// not authorized.
 	if !ok {
-		resp := fmt.Sprintf("only [%s](https://github.com/orgs/%s/people) org members may request release block label", org, org)
+		resp := fmt.Sprintf("Only top-level approvers from the [OWNERS](https://github.com/%s/%s/blob/main/OWNERS_ALIASES) file may request the release block label", org, org)
 		s.log.WithFields(l.Data).Info(resp)
 		return s.ghc.CreateComment(org, repo, num, plugins.FormatICResponse(ic.Comment, resp))
 	}