Pixlet binary not working on Ubuntu 20.04 / Github Actions

I built a web based version of pixlet that uses the official pixlet linux_amd64 binary to run unit tests via Github Actions. I download that binary from the pixlet github releases page.

I was attempting to update to the latest version but it fails to execute. After some trial and error in this PR I determined that the last version that runs properly is 0.8.2. It seems something in 0.8.4 caused it to not run in the Github Actions Ubuntu 20.04 environment.

The 0.8.4 change was to fix the goreleaser which also appears to have aded arm64 builds to the release artifacts.

Any ideas on this one? Is anyone using the pixlet linux_amd64 builds successfully?