This update adds support for 'page 2 bis' within Spanish tax reporting (l10n_es_reports). This enhancement ensures accurate and complete reporting of financial data required by Spanish tax authorities, addressing a key compliance need. The changes involve updating the 390 boe.txt file to accommodate this new data representation.

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

task-5881396