CI: cirrus: switch to FreeBSD-13.0

we use outdated FreeBSD-12.2, which is outdated, let us update
to the actual release

(cherry picked from commit 9902bf266c4856c35e81ff2cbed89732d750c209)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 07bb43b0c2134014e623ecb4d8f9d3a942b976c1)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
1 file changed