CI FreeBSD: update to FreeBSD 14

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>

.cirrus.yml

@@ -2,9 +2,9 @@ freebsd_task:
   name: FreeBSD
 
   matrix:
-    - name: FreeBSD 13.2
+    - name: FreeBSD 14.0
       freebsd_instance:
-        image_family: freebsd-13-2
+        image_family: freebsd-14-0
 
   pkginstall_script:
     - pkg update -f