[FIX] account: correct computation of tax_audit

https://github.com/odoo/odoo/commit/b7232b14b7f2423241b24b4eef1300f1a1b425cf#diff-78f3e1847de8ca0acf28d72a412947a549acdb08142d1dadf7646363d7972cb0R760 wrongly removed the assignation of the field in the compute function

closes odoo/odoo#113193

X-original-commit: 5ff20fc5e19411506b5d56e57b44a0bf461e0a91
Signed-off-by: Laurent Smet <las@odoo.com>
Signed-off-by: Olivier Colson (oco) <oco@odoo.com>

addons/account/models/account_move_line.py

@@ -788,6 +788,8 @@ class AccountMoveLine(models.Model):
                 audit_str += separator if audit_str else ''
                 audit_str += tag_name + ': ' + formatLang(self.env, tag_amount, currency_obj=currency)
 
+            record.tax_audit = audit_str
+
     @api.depends('product_id')
     def _compute_product_uom_id(self):
         for line in self: