`Build binaries` action failing because Github upgraded Node to 18

[lucasmrod]

The Build Binaries action is failing on main and in all PRs because of a recent change by Github to upgrade to Node 18, see actions/runner-images#7002

Sample failure: https://github.com/fleetdm/fleet/actions/runs/4224500097/jobs/7335531996

[fleet-release]

Clouds of worry part,
Node Eighteen brings cheer anew;
Binaries restored.