Integrated: 2481: Update .github/workflows/ci.yml for Linux

[Zhao Song]

On Thu, 17 Apr 2025 18:29:00 GMT, Zhao Song <zsong at openjdk.org> wrote:

> Ubuntu-20.04 was deprecated on April 15th, 2025.
> https://github.com/actions/runner-images/issues/11101

This pull request has now been integrated.

Changeset: dfa2d598
Author:    Zhao Song <zsong at openjdk.org>
URL:       https://git.openjdk.org/skara/commit/dfa2d598564fd363b9a0d5e531f055d917ab652d
Stats:     1 line in 1 file changed: 0 ins; 0 del; 1 mod

2481: Update .github/workflows/ci.yml for Linux

Reviewed-by: erikj

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PR: https://git.openjdk.org/skara/pull/1715