This commit replaces the <button> elements used in the custom button of the donation snippet by <span> elements because putting inputs inside buttons is not valid HTML. task-2637492 closes odoo/odoo#78089 X-original-commit: 38447f80f462ebf9d0877b5e170bb5dc1bf13725 Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>