Update to use Node 16

[quinn-dougherty]

I get this warning in github:

Node.js 12 actions are deprecated. For more information see: https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/. Please update the following actions to use Node.js 16: cachix/install-nix-action, cachix/cachix-action, cachix/cachix-action

[domenkozar]

Fixed on master