Обсуждение: pgsql: ci: switch to freebsd 13.1

ci: switch to freebsd 13.1

freebsd 13.0 is out of support, switch to 13.1. It might be a good idea to
remove the minor version number from the image name, but there's not been a
response to that so far...

Discussion: https://postgr.es/m/20220728095704.ryywoaz4dqqrwstc@alap3.anarazel.de
Backpatch: 15-, just like the CI support

Branch
------
REL_15_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/9c9fc20e6fdf34d480b55bd517487b0affbf18e0

Modified Files
--------------
.cirrus.yml | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)