Fix conntrack return pointer

common/dialer/conntrack/conn.go

@@ -12,7 +12,7 @@ type Conn struct {
 	element *list.Element[io.Closer]
 }
 
-func NewConn(conn net.Conn) (*Conn, error) {
+func NewConn(conn net.Conn) (net.Conn, error) {
 	connAccess.Lock()
 	element := openConnection.PushBack(conn)
 	connAccess.Unlock()

common/dialer/conntrack/packet_conn.go

@@ -12,7 +12,7 @@ type PacketConn struct {
 	element *list.Element[io.Closer]
 }
 
-func NewPacketConn(conn net.PacketConn) (*PacketConn, error) {
+func NewPacketConn(conn net.PacketConn) (net.PacketConn, error) {
 	connAccess.Lock()
 	element := openConnection.PushBack(conn)
 	connAccess.Unlock()