git: openjdk/jdk: 8254054: Pre-submit testing using GitHub Actions should not use the deprecated set-env command

[Robin Westberg]

Changeset: d2b1dc6d
Author:    Robin Westberg <rwestberg at openjdk.org>
Date:      2020-10-06 13:39:57 +0000
URL:       https://git.openjdk.java.net/jdk/commit/d2b1dc6d

8254054: Pre-submit testing using GitHub Actions should not use the deprecated set-env command

Reviewed-by: ehelin, erikj

! .github/workflows/submit.yml