Stop using deprecated way of setting workflow output (DB-84)

[pvanbuijtene]

Changed: Use $GITHUB_OUTPUT for workflow output.

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

[linear[bot]]

DB-84 Update GitHub workflows which use deprecated `::set-output`

Workflows which use the deprecated `::set-output`command will stop working on 1st June. [https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/](https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/)