ci: Update main.yml

[smals-jy]

To fix warning I saw during building of mr :

• https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/
• https://github.blog/changelog/2023-07-24-github-actions-update-on-save-state-and-set-output-commands/

Warning: 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/

[costateixeira]

technical change - good idea to update technical dependencies. @smals-jy did you test it?

[smals-jy]

@costateixeira It was fine when I tested it on my fork - https://smals-jy.github.io/medication/