Fix deprecated gha outputs

[dimko]

Replace the deprecated set-output in github actions with ... >> $GITHUB_OUTPUT

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

TL;DR

name: Save state run: echo "::save-state name={name}::{value}"

name: Set output run: echo "::set-output name={name}::{value}"

name: Save state run: echo "{name}={value}" >> $GITHUB_STATE

name: Set output run: echo "{name}={value}" >> $GITHUB_OUTPUT

Ref: https://github.com/netdata/infra/issues/3541