update ci.yml and be more explicit in .nimble

[narimiran]

No description provided.

[tersec]

CI failures are not as a result of the PR

[tersec]

Basically ORC fails now, but refc works. This was true even with released v2.0.6 on master before merging. This is a known issue with nim-metrics to some extent, that it's not really gc-safe by design.

One option here is to just only test it in refc (or use our usual trick of, have it fail on success and vice versa in ORC) -- for IFT/Nimbus there's not really an ORC use case yet, and despite this particular PR not making it worse, it would be worth triaging what one cares about this CI to "work" (which is basically refc, ORC optional) and make sure that's prioritized.