NWM_UDS: use sizeof(<var being used>) instead of hard-coded type (#4093)

* NWM_UDS: use sizeof(<var being used>) instead of hard-coded type

Intend to fix #4090. 

` node_map.node.second` type was changed to `u16` in #3985. However the type change wasn't reflected here. Should have used variable name instead to automatically do type change

* NWM_UDS: ... and also the node.first one

* NWM_UDS: ... and here

* Network: bump version because we changed UDS packet layout

* Update nwm_uds.cpp

src/network/room.h

@@ -12,7 +12,7 @@
 
 namespace Network {
 
-constexpr u32 network_version = 2; ///< The version of this Room and RoomMember
+constexpr u32 network_version = 3; ///< The version of this Room and RoomMember
 
 constexpr u16 DefaultRoomPort = 24872;