Add channel for rubocop 1.60

[hampld]

Hi,

Rubocop has released a new version: https://github.com/rubocop/rubocop/releases/tag/v1.60.0

Please add a channel that mirrors that release.

Thanks.

tumbleweed rolling through the issues

[rebeccafae]

I second this request!

[rebeccafae]

The beta channel is moving really fast, and we need a stable more recent channel

I was able to use 1-56-3 for a while, but now new updates are making that not possible. Can we please get ANY newer version made into a permanent channel (maybe 1.63.5 #370)? I know a lot of us need this!

Taking it from any commit on the beta channel would work just fine.

@fede-moya tagging you since you helped merge some of those beta channel PRs