Bug/dce deploy still requires gh token

[joshmarsh]

Proposed changes

This PR replaces calls to the Github GraphQL API by using the public <repo>/releases/latest/download/<asset> url to download deployment assets.

We were previously using Github's GraphQL API to download assets during dce deployment. This allowed us to authenticate with our private repo using Github Personal Access Tokens. Now that the repo is public, we no longer need or want to use an API that requires auth tokens for downloading assets.

Types of changes

• [x] Bugfix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Refactor (changes to code, which do not change application behavior)

Checklist

• [x] I have filled out this PR template
• [x] I have read the CONTRIBUTING doc
• [ ] I have added automated tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation (README.md, inline comments, etc.)
• [ ] I have updated the CHANGELOG.md under a ## next release, with a short summary of my changes

Relevant Links

Further comments

[eschwartz]

sweet, thanks @joshmarsh