Send `resumed` in ready payload instead of `resume`.

[devoxin]

Changes

This changes the resume field to resumed to be inline with what Lavalink clients should expect, as per the implementation documentation at https://lavalink.dev/api/websocket.html#ready-op

Why

During my testing, my client was looking for a resumed field but was not seeing it, and throwing an error causing the websocket connection to be immediately terminated with no attempt at reconnecting. I don't believe this is the duty of clients to change as this server markets itself as being generally compatible with clients, thus the core implementation should at least match that.

Checkmarks

• [x] The modified endpoints have been tested.
• [x] Used the same indentation as the rest of the project.
• [x] Still compatible with LavaLink clients.

Additional information

N/A.

[ThePedroo]

Thanks for the PR. Just one thing: Could you update the commit message based on our contributing repository?

[devoxin]

Done.