[FIX] l10n_es: Replace grid 61 by the proper tag on tax templates

Fix https://github.com/odoo/odoo/commit/b40216a8ae8fefd03311b2884e7b83644baac0a1

 was merged though partially ready.

closes odoo/odoo#78987

Signed-off-by: Josse Colpaert <jco@openerp.com>