Release v0.37.0-rc4

[thanethomson]

Given that I forgot to bump the version number in #404, this PR:

1. Bumps the version number
2. Tests the release version number check in CI for release branches (all pushes to release/**)
3. Enforces the version check when we push tags

I first created a branch reference with no changes and pushed it, resulting in this failed job: https://github.com/cometbft/cometbft/actions/runs/4304426331/jobs/7505444362

Now I've updated version/version.go, resulting in the passing job here: https://github.com/cometbft/cometbft/actions/runs/4304443882/jobs/7505482959

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PR checklist

• Tests written/updated
• Changelog entry added in .changelog (we use unclog to manage our changelog)
• Updated relevant documentation (docs/ or spec/) and code comments

[sergio-mena]

LGTM.
Could you add a small sentence in RELEASES.md mentioning this check in the step we say "bump the version"?

[thanethomson]

Could you add a small sentence in RELEASES.md mentioning this check in the step we say "bump the version"?

Sure thing! I'll do this in a separate PR to main and backport it across the release branches.