merge-ort: loosen commented requirements

merge-ort: loosen commented requirements

The comment above type_short_descriptions claimed that the order had to
match what was found in the conflict_info_and_types enum.  Since
type_short_descriptions uses designated initializers, the order should
not actually matter; I am guessing that positional initializers may have
been under consideration when that comment was added, but the comment
was not updated when designated initializers were chosen.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>