ci: Bump FreeBSD in CI to v13.3

Ref: smol-rs/polling#206 (comment)

Signed-off-by: John Nunley <[email protected]>

Author: notgull

.cirrus.yml

@@ -14,7 +14,7 @@ env:
 freebsd_task:
   name: test ($TARGET)
   freebsd_instance:
-    image_family: freebsd-13-2
+    image_family: freebsd-13-3
   matrix:
     - env:
         TARGET: x86_64-unknown-freebsd