docs: remove deprecated set-env example

docs: remove deprecated set-env example

Merge pull request peter-evans#587 from peter-evans/url-output

feat: output the pull request url

Merge pull request peter-evans#558 from peter-evans/update-distribution

Update distribution

Merge pull request peter-evans#526 from peter-evans/detached-head

feat: support checkout on a commit in addition to a ref

Merge pull request peter-evans#508 from peter-evans/update-distribution

Update distribution

Merge pull request peter-evans#497 from peter-evans/branch-check-fix

Fix branch naming check for push-to-fork

Merge pull request peter-evans#477 from peter-evans/dev

signoff

Merge pull request peter-evans#429 from peter-evans/dev

v3

Update documentation