This update enhances the Spanish tax reporting functionality within Odoo Enterprise by incorporating data from 'page 2 bis' into the 390 boe report. This ensures compliance with Spanish tax regulations and provides more complete financial reporting for Spanish businesses using the Enterprise edition. The changes were made to improve the accuracy and completeness of tax reports.

In this commit:
- We are adding representation of page 2 bis to the 390 boe.txt 

task-5881396

Forward-Port-Of: odoo/enterprise#106861