Cirrus-CI: switch to FreeBSD 13.3

Sponsored by:	The FreeBSD Foundation

(cherry picked from commit b15889d6d2)
(cherry picked from commit a1883e20bc)

Approved by:	re (cperciva)

.cirrus.yml

@@ -4,7 +4,7 @@ compute_engine_instance:
   # gcloud compute images list --project freebsd-org-cloud-dev --no-standard-images
   platform: freebsd
   image_project: freebsd-org-cloud-dev
-  image: freebsd-13-2-release-amd64
+  image: freebsd-13-3-release-amd64
   cpu: 8
   memory: 8G
   disk: 40