Bump node version to 16

[ichernev]

github is complaining about actions using node 12 with the following warning:

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: ATiltedTree/setup-rust@v1

This is an attempt to fix it.

EDIT: It removed the warning in my project, so I guess that is one data point in the test department.