[BUG] delete_channel_permission() uses wrong api endpoint

[Donbur4156]

Library Version

5.8.0

Describe the Bug

deleting channel permissions is not working.

Steps to Reproduce

get Channel Object
get User Object
await channel.delete_permission(target=user)

Expected Results

deleting the user from channel permissions list

Minimal Reproducible Code

No response

Traceback

No response

Checklist

• I have searched the open issues for duplicates.
• I have shown the entire traceback, if possible.
• I have removed my token from display, if visible.
• I have attempted to debug this myself, and I believe this issue is with the library

Additional Information

The API Route is missing "permissions".
I´m making a PR with the change.