Answer by Caleb for Passing env variable inputs to a reusable workflow

The use of ::set-output is now deprecated.

See https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/.

Now recommended:

- name: Save state  run: echo "{name}={value}" >> $GITHUB_STATE- name: Set output  run: echo "{name}={value}" >> $GITHUB_OUTPUT