Fix 1.17 ping handler (#365)

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_16_4to1_17/Protocol1_16_4To1_17.java

@@ -187,7 +187,9 @@ public final class Protocol1_16_4To1_17 extends BackwardsProtocol<ClientboundPac
                     wrapper.cancel();
 
                     // Plugins expecting a real response will have to handle this accordingly themselves
+                    int id = wrapper.read(Type.INT);
                     PacketWrapper pongPacket = wrapper.create(ServerboundPackets1_17.PONG);
+                    pongPacket.write(Type.INT, id);
                     pongPacket.sendToServer(Protocol1_16_4To1_17.class);
                 });
             }