refactor: use of unique_ptr instead of new

src/game/server/Server.cpp

@@ -107,7 +107,7 @@ void Server::updateSockets() {
     }
 }
 
-void Server::broadcastPacket(protocol::Packet* packet) {
+void Server::broadcastPacket(const protocol::Packet* packet) {
     for (auto& connection : m_Connections) {
         ServerConnexion& con = connection.second;
         con.sendPacket(packet);