Pipeline naming standards not documented

[antony-with-no-h]

Is your feature request related to a problem? Please describe.

I cannot seem to find the naming standards enforced by Concourse when it comes to pipelines. The only hint of their existance comes from warnings emitted by the CLI.

Given it a good go (of finding them) through googling, keywords on the concourse docs and looking through issues. Following a few issues I was able to get to https://github.com/concourse/rfcs/pull/40, specifically 040-valid-identifiers/proposal.md

In my case it was a capital letter that raised the warning, which is not really the issue I can adjust the name, I can't easily find what else is considered illegal by Concourse.

Describe the solution you'd like

A mention of the naming standards which appear to be [a-z_-]?

Describe alternatives you've considered

No response

Additional context

No response