Merge pull request #3462 from Calinou/hlm-clarify-cpp-implementation

Clarify that NetworkedMultiplayerPeer cannot be extended via GDScript

tutorials/networking/high_level_multiplayer.rst

@@ -57,7 +57,7 @@ Mid level abstraction
 Before going into how we would like to synchronize a game across the network, it can be helpful to understand how the base network API for synchronization works.
 
 Godot uses a mid-level object :ref:`NetworkedMultiplayerPeer <class_NetworkedMultiplayerPeer>`.
-This object is not meant to be created directly, but is designed so that several implementations can provide it.
+This object is not meant to be created directly, but is designed so that several C++ implementations can provide it.
 
 This object extends from :ref:`PacketPeer <class_PacketPeer>`, so it inherits all the useful methods for serializing, sending and receiving data. On top of that, it adds methods to set a peer, transfer mode, etc. It also includes signals that will let you know when peers connect or disconnect.