fix(node): stop appending /v3 if done already

[ooliver1]

Summary

From Cattosarus on Discord

14.02.2023 13:26:07 | ERROR | An HTTP error occured: {"timestamp":1676373968330,"status":404,"error":"Not Found","message":"Not Found","path":"/v3/v3/loadtracks"} (404)
Traceback (most recent call last):
  File "C:\Users\Cattosarus\Desktop\mafic-bot\cogs\music.py", line 89, in play
    results = await player.fetch_tracks(query)
  File "C:\Users\Cattosarus\AppData\Local\Programs\Python\Python39\lib\site-packages\mafic\player.py", line 457, in fetch_tracks
    return await node.fetch_tracks(query, search_type=raw_type)
  File "C:\Users\Cattosarus\AppData\Local\Programs\Python\Python39\lib\site-packages\mafic\node.py", line 891, in fetch_tracks
    data: TrackLoadingResult = await self.__request(
  File "C:\Users\Cattosarus\AppData\Local\Programs\Python\Python39\lib\site-packages\mafic\node.py", line 854, in __request
    raise HTTPNotFound(text)
mafic.errors.HTTPNotFound: An HTTP error occured: {"timestamp":1676373968330,"status":404,"error":"Not Found","message":"Not Found","path":"/v3/v3/loadtracks"} (404)

Checklist

• If code changes were made then they have been tested.
• I have run task lint to format code and my changes.
• I have run task pyright and fixed the relevant issues.