CI: bump "actions/checkout" to v3 for cross zoo matrix

actions/checkout@v2 is deprecated, accidently it was not updated in our
build definition

(cherry picked from commit 86a40f5de9276e8f5d82a20b1bf72173fc8d9efa)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 476a4458f394aaeae172e3f568849bada4be5500)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 6597dbf488007288630d8c6a150d987cba6a206c)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit bbdd9f3f1963e24b5f86f7f1fe01bcc46a3a223a)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
1 file changed