fix VoiceRegion.ID type

[MCausc78]

otherwise rest.Voice.GetVoiceRegions always fails

>>> url = 'https://discord.com/api/v10/voice/regions'
>>> headers = {'Authorization': 'Bot ' + token}
>>> response = requests.get(url, headers=headers)
>>> response
<Response [200]>
>>> response.json()
[{'id': 'brazil', 'name': 'Brazil', 'custom': False, 'deprecated': False, 'optimal': False}, {'id': 'hongkong', 'name': 'Hong Kong', 'custom': False, 'deprecated': False, 'optimal': False}, {'id': 'india', 'name': 'India', 'custom': False, 'deprecated': False, 'optimal': False}, {'id': 'japan', 'name': 'Japan', 'custom': False, 'deprecated': False, 'optimal': False}, {'id': 'rotterdam', 'name': 'Rotterdam', 'custom': False, 'deprecated': False, 'optimal': False}, {'id': 'russia', 'name': 'Russia', 'custom': False, 'deprecated': False, 'optimal': False}, {'id': 'singapore', 'name': 'Singapore', 'custom': False, 'deprecated': False, 'optimal': False}, {'id': 'southafrica', 'name': 'South Africa', 'custom': False, 'deprecated': False, 'optimal': False}, {'id': 'sydney', 'name': 'Sydney', 'custom': False, 'deprecated': False, 'optimal': False}, {'id': 'us-central', 'name': 'US Central', 'custom': False, 'deprecated': False, 'optimal': False}, {'id': 'us-east', 'name': 'US East', 'custom': False, 'deprecated': False, 'optimal': False}, {'id': 'us-south', 'name': 'US South', 'custom': False, 'deprecated': False, 'optimal': False}, {'id': 'us-west', 'name': 'US West', 'custom': False, 'deprecated': False, 'optimal': False}]
>>>

[topi314]

for reference: https://discord.com/developers/docs/resources/voice#voice-region-object-voice-region-structure

[topi314]

thanks