git: openjdk/jol: 7903113: JOL: GHA: Allow one concurrent run per PR only

[duke]

Changeset: 8f8c5497
Author:    Aleksey Shipilëv <shade at redhat.com>
Committer: GitHub <noreply at github.com>
Date:      2022-02-23 14:23:04 +0000
URL:       https://git.openjdk.java.net/jol/commit/8f8c5497d6f242b961b52b92b5baa8ae7b3c800f

7903113: JOL: GHA: Allow one concurrent run per PR only


! .github/workflows/pre-integration.yml