CI: Update to actions/checkout@v3

No functional change, but we should keep this current.

(cherry picked from commit 5f4ddb54b05ae0355b1f64c22263a6bc381410df)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 1e9260500eb71943dcd5f1329550f98d0be08a47)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
7 files changed