revert 82f7c56e3252b91c1f0bcd3c064500bcba93e909
revert Update actions/checkout action to v4 (#3)
node20 is not ready yet for `act`
See issue: https://github.com/nektos/act/issues/1967
See PR: https://github.com/nektos/act
Reviewed-on: https://git.rita.moe/kody/tz/pulls/3
Co-authored-by: Renovate [bot] <renovate@rita.moe>
Co-committed-by: Renovate [bot] <renovate@rita.moe>