How to add multiple labels with GitHub Actions?

How do I add more labels at once with a PR with this:

             curl --request PATCH \
             --url ${{ github.event.pull_request.issue_url }} \
             --header 'authorization: token ${{ secrets.GITHUB_TOKEN }}' \
             --data '{"labels": [ "letters" ]}'

when I try with more lines of --data '{"labels": [ "qweryriw" ]}' it deletes former labels and add the last one

2 posts were merged into an existing topic: How do I add Label, Milestone and Project with Actions?