makefs tests: Skip a ZFS regression test in CI

It triggers panics after the latest OpenZFS import.

PR:		265849

usr.sbin/makefs/tests/makefs_zfs_tests.sh

@@ -529,6 +529,10 @@ snapshot_body()
 	create_test_dirs
 	cd $TEST_INPUTS_DIR
 
+	if [ "$(atf_config_get ci false)" = true ]; then
+		atf_skip "https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=265849"
+	fi
+
 	mkdir dir
 	echo "hello" > dir/hello
 	echo "goodbye" > goodbye