Skip devices with name of NoneType

[AphLute]

This fixes this error I was getting running the python script on Windows 11. Although I am not certain it is a Windows 11 thing necessarily! (I also had trouble at this same spot running the .exe, but the error from the .exe didn't indicate anything like this.)

>> This seems to be a valid V2 Base Station.

Traceback (most recent call last):
  File "C:\Program Files\LH-Manager\lighthouse-v2-manager.py", line 157, in <module>
    loop.run_until_complete(run(loop, lh_macs))
  File "C:\Users\me\AppData\Local\Programs\Python\Python311\Lib\asyncio\base_events.py", line 653, in run_until_complete
    return future.result()
           ^^^^^^^^^^^^^^^
  File "C:\Program Files\LH-Manager\lighthouse-v2-manager.py", line 56, in run
    if d.name.find("LHB-") != 0:
       ^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'find'