chore(dx): run prerelease task only when pr is ready for review

[franklevasseur]

Alright, this is my take on improving the prerelease GH task.

If you toggle between "draft" and "ready for review" you'll see that the action gets canceled and started accordingly.

Also, you'll notice that ${GITHUB_HEAD_REF} outputs the correct branch name instead of something like refs_pull_120_merge.

[franklevasseur]

this works

[franklevasseur]

I merge:

• this works
• this was broken before
• its only next, we can still change it
• if you dont agree DM me on Slack