Warning on runs due to Github actions deprecating Node12

[elsewhat]

When running the action now, Github provides a warning
The following actions uses node12 which is deprecated and will be forced to run on node16: anthonyvscode/newman-action@v1. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

Assume the solution is to bump the runs: section to node16 and test

newman-action/action.yml

Line 90 in 2667a18

using: 'node12'