If you can't wait for this to get merged:
There is a tag in the forked repo that can be used meanwhile.
georgespalding/jacoco-report@v1.4.0-rc0 (Remember best practice is to take a look at the changes introduced, rather than blindly trusting the tag)
This PR fixes The GHA set-output deprecation warning. (This is a rip-off of https://github.com/Madrapps/jacoco-report/pull/29 with the suggestions in that PR addressed)
If you can't wait for this to get merged: There is a tag in the forked repo that can be used meanwhile.
georgespalding/jacoco-report@v1.4.0-rc0
(Remember best practice is to take a look at the changes introduced, rather than blindly trusting the tag)