chore: update download artifacts in release

[jsjoeio]

A while back, @code-asher and I discussed improving the "Download artifacts" step in the release.yaml workflow.

These changes make it more "sturdy" because we now fail if no artifact found in the latest completed build.yaml workflow.

Pros

• ensures the latest workflow must have the artifact and be completed
• fails if artifacts missing

Cons

• means doing a release might be slower because you have to wait for their to be a completed workflow

[jsjoeio]

These are the defaults but I opted to be explicit for these reasons:

• won't break if defaults change
• maintainers don't have to go to docs to see defaults because we're explicit here

[github-actions]

✨ code-server dev build published to npm for PR #5841!

• Last publish status: success
• Commit: 4643dd5

To install in a local project, run:

npm install @coder/code-server-pr@5841

To install globally, run:

npm install -g @coder/code-server-pr@5841

[codecov]

Codecov Report

Merging #5841 (4643dd5) into main (ac6b5bd) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5841   +/-   ##
=======================================
  Coverage   74.94%   74.94%           
=======================================
  Files          30       30           
  Lines        1688     1688           
  Branches      371      371           
=======================================
  Hits         1265     1265           
  Misses        361      361           
  Partials       62       62           

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