Migrate github actions away from setoutput

[teolemon]

What

deploy (robotoff-net)
The following actions uses node12 which is deprecated and will be forced to run on node16: tomchv/wait-my-workflow@v1.1.0. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/
deploy (robotoff-net)
The following actions uses Node.js version which is deprecated and will be forced to run on node20: tomchv/wait-my-workflow@v1.1.0. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/
deploy (robotoff-net)
The set-output command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

[teolemon]

I have contacted the owner of the action to ask for a release solving this.

[raphael0202]

Related issue on the action repo: TomChv/wait-my-workflow#423

[teolemon]

@raphael0202 fyi, PR to fix it at our level in smoothie: openfoodfacts/smooth-app#5584