fix: test broken on opensource repo

test/util_other_test.go

@@ -4,9 +4,9 @@ package main
 
 import (
 	"errors"
-	"net/netip"
+	"net"
 )
 
-func defaultRouteIP() (netip.Addr, error) {
-	return netip.Addr{}, errors.New("not supported")
+func defaultRouteIP() (net.IP, error) {
+	return nil, errors.New("not supported")
 }