add a description to issue tag 'no-needs-review-bot' so it shows in docs

What would the description be?

There is an issue which aims to remove some issue tags from that page. I am not sure this tag is included, but it would be better to coordinate with the efforts done in that issue.

> What would the description be?

I don't know, but it should be on that page because it's useful, and AFAICT only tags with descriptions are shown on that page.