[jdk11u-dev] RFR: 8301397: [11u, 17u] Bump jtreg to fix issue with build JDK 11.0.18

[Goetz Lindenmaier]

On Mon, 30 Jan 2023 21:27:25 GMT, Christoph Langer <clanger at openjdk.org> wrote:

> Bump GHA jtreg to 6.1+3 to unbreak GHA.

lgtm

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Marked as reviewed by goetz (Reviewer).

PR: https://git.openjdk.org/jdk11u-dev/pull/1700