CI: Update to actions/cache@v4

No functional change, but this upgrade is required, due to the v3 runtime being
deprecated:

> Node.js 16 actions are deprecated. Please update the following actions to use
> Node.js 20: actions/cache@v3. For more information see:
> https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

(cherry picked from commit 4559470728bf12401819814647e144367a3737eb)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit f29e57b7da9d568d851ecf15d973a36e3c91e2e1)
[wt: no aws-lc job in 2.8]
Signed-off-by: Willy Tarreau <w@1wt.eu>
1 file changed