Integrated: added jdk21 to test matrix

[Jiří Vaněk]

On Thu, 18 Jan 2024 11:27:54 GMT, Jiří Vaněk <jvanek at openjdk.org> wrote:

> This is adding jdk21 to jdk test matrix and removing at8 branch, which is no longer used
> I had not added at7 branch.
> ---------
> ### Progress
> - [x] Change must not contain extraneous whitespace
> 
> ### Error
>  ⚠️ The pull request body must not be empty.
> 
> ### Reviewing
> <details><summary>Using <code>git</code></summary>
> 
> Checkout this PR locally: \
> `$ git fetch https://git.openjdk.org/asmtools.git pull/72/head:pull/72` \
> `$ git checkout pull/72`
> 
> Update a local copy of the PR: \
> `$ git checkout pull/72` \
> `$ git pull https://git.openjdk.org/asmtools.git pull/72/head`
> 
> </details>
> <details><summary>Using Skara CLI tools</summary>
> 
> Checkout this PR locally: \
> `$ git pr checkout 72`
> 
> View PR using the GUI difftool: \
> `$ git pr show -t 72`
> 
> </details>
> <details><summary>Using diff file</summary>
> 
> Download this PR as a diff file: \
> <a href="https://git.openjdk.org/asmtools/pull/72.diff">https://git.openjdk.org/asmtools/pull/72.diff</a>
> 
> </details>

This pull request has now been integrated.

Changeset: 7ea57726
Author:    Jiří Vaněk <jvanek at openjdk.org>
Committer: Leonid Kuskov <lkuskov at openjdk.org>
URL:       https://git.openjdk.org/asmtools/commit/7ea57726a181b819c4b6331b19160c4fce238b11
Stats:     3 lines in 1 file changed: 0 ins; 0 del; 3 mod

added jdk21 to test matrix

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PR: https://git.openjdk.org/asmtools/pull/72