Add information about release cadence to README.md

[gmlewis]

With the recent requests for new releases, it would be nice to provide this FAQ in the README.md.

[codecov]

Codecov Report

Merging #1830 (1370fcb) into master (94eb482) will not change coverage.
The diff coverage is n/a.

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##           master    #1830   +/-   ##
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  Coverage   97.56%   97.56%           
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  Files         104      104           
  Lines        6602     6602           
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  Hits         6441     6441           
  Misses         87       87           
  Partials       74       74           

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[willnorris]

are we just doing on-demand releases? I think the point I was making in #1280 was just about having a more predictable release schedule, not abandoning scheduled releases at all. That said, you're the one doing the bulk of the lifting here, so it's up to you if you want to try and do scheduled releases.

The most important part is that we set expectations appropriately, which this certainly does if this is the plan going forward.

[gmlewis]

Well, it certainly is easier to perform on-demand releases from a maintenance perspective.

If you would prefer scheduled releases, what kind of schedule are you thinking?

[willnorris]

4-6 weeks?

[willnorris]

or even longer if there's not much new

[gmlewis]

OK, sure, let's try that. I'll close this PR.