[FIX] repair: din5008 repair printing tracebak

This commit fix a traceback when printing the repair quotation
using the DIN 5008 repair module.
The field updated was not the correct one

task id : 3178931

closes odoo/odoo#115393

X-original-commit: 008cd881abcc9856de8bd7a7a8a5382fc31dc272
Signed-off-by: Arnold Moyaux (arm) <arm@odoo.com>