Fixed memory leak in the Websocket example

[Mis1eader-dev]

The heap will fill up with memory leaks if the pointer of previous clients is nullified without freeing up their allocated memory.

[Mis1eader-dev]

It appears cleaning up dynamically allocated memory of individual WebsocketHandlers causes heap corruption, is memory cleanup handled by the library itself? I doubt that this is the case. There is an issue that is not visible in plain sight which has to do with memory deallocation.