Change to correct RPC syntax in Multiplayer bomber demo (#802)

networking/multiplayer_bomber/bomb.gd

@@ -11,7 +11,7 @@ func explode():
 	for p in in_area:
 		if p.has_method("exploded"):
 			# Exploded can only be called by the authority, but will also be called locally.
-			p.rpc(&"exploded", from_player)
+			p.exploded.rpc(from_player)
 
 
 func done():

networking/multiplayer_bomber/gamestate.gd

@@ -27,7 +27,7 @@ signal game_error(what)
 # Callback from SceneTree.
 func _player_connected(id):
 	# Registration of a client beings here, tell the connected player that we are here.
-	rpc_id(id, StringName("register_player"), player_name)
+	register_player.rpc_id(id, player_name)
 
 
 # Callback from SceneTree.