Fix usage of deprecated set-output command

[emilymclean]

Pipelines using this action produce the warning

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/

This pull request in the @actions/core library changes the output format from the old style (e.g. echo "::set-output NAME=VALUE" to the new style echo "NAME=VALUE" >> $GITHUB_OUTPUT and was made available in the version 1.10.0.

Other dependencies have been updated as well, @vercel/ncc was seemingly incompatible, and the others were just to keep things up to date.

EDIT: I have also bumped node to 20, since apparently that's the required version now

[recih]

Seems nice! Thanks!