RFR: 7903431: Update GitHub Actions workflow

[Christian Stein]

On Mon, 13 Feb 2023 23:14:42 GMT, Jonathan Gibbons <jjg at openjdk.org> wrote:

>> Update workflow to use `actions/checkout at v3` and set up latest Oracle's JDK 17 to build `jtreg`.
>
> .github/workflows/test.yml line 16:
> 
>> 14:     steps:
>> 15:     - name: 'Check out repository'
>> 16:       uses: actions/checkout at v3
> 
> Where do I find the definition of this action?

It is here: https://github.com/actions/checkout

The common pattern is to prepend `https://github.com/` to an action in use - and omit the version information.

-------------

PR: https://git.openjdk.org/jtreg/pull/148