GitHub CLI 2.4.0

@g14a

New features

Add repo edit command by @g14a in #4318
release create: add --generate-notes functionality by @Sixeight in #4467
release create: add interactive mode to choose a tag name by @sguzmanm in #4525
pr merge: allow editing commit subject by @cristiand391 in #3344
secret set: allow importing secrets from a dotenv file by @lpessoa in #4534
run list/view: add --json export functionality by @cristiand391 in #3869
Refresh man pages by @mislav in #4939
Add installation instructions for pkgsrc by @bsiegert in #4931

pr view: ensure that PR reviews are always rendered in --comments mode by @mislav in #4848
api: handle HTTP 409 error message from the server by @mislav in #4862
issue edit: fix race condition when updating labels by @despreston in #4861
browse: support --commit with the repo override flag by @bchadwic in #4845
repo create: fix printing repo URL in no-TTY mode by @mislav in #4904
repo sync: use the new merge-upstream API if available by @mislav in #4942
run: display and treat "Cancelled" status as a failure by @bchadwic in #4850
extension upgrade: an already up-to-date extension should not a produce a failure by @tisonkun in #4857
Avoid showing non-open PRs as related to the default branch by @AyushRawal in #4285
git remotes: fix treating ssh.github.com as a github.com host by @mislav in #4938
Bump Cobra to 1.3.0 for improved completion support by @mislav in #4936
Bump spinner to 1.18.0 by @mislav in #4937