Fix surfshark updater and update server data

internal/updater/ips.go

@@ -7,15 +7,18 @@ import (
 )
 
 func uniqueSortedIPs(ips []net.IP) []net.IP {
-	uniqueIPs := make(map[string]struct{})
+	uniqueIPs := make(map[string]struct{}, len(ips))
 	for _, ip := range ips {
-		uniqueIPs[ip.String()] = struct{}{}
+		key := ip.String()
+		uniqueIPs[key] = struct{}{}
 	}
-	ips = make([]net.IP, len(uniqueIPs))
-	i := 0
-	for ip := range uniqueIPs {
-		ips[i] = net.ParseIP(ip)
-		i++
+	ips = make([]net.IP, 0, len(uniqueIPs))
+	for key := range uniqueIPs {
+		ip := net.ParseIP(key)
+		if ipv4 := ip.To4(); ipv4 != nil {
+			ip = ipv4
+		}
+		ips = append(ips, ip)
 	}
 	sort.Slice(ips, func(i, j int) bool {
 		return bytes.Compare(ips[i], ips[j]) < 0