Bump version 12.0.2.8.0

CHANGELOG:

## [12.0.2.8.0] - 2024-09-10
### Added
- [#1228](https://git.coopdevs.org/coopdevs/som-connexio/odoo-somconnexio/-/merge_requests/1228) Warning message when breaking packs with holder change wizard
- [#1267](https://git.coopdevs.org/coopdevs/som-connexio/odoo-somconnexio/-/merge_requests/1267) Filter parent_pack_contract_id by same partner_id and active
- [#1261](https://git.coopdevs.org/coopdevs/som-connexio/odoo-somconnexio/-/merge_requests/1261) Add UNL12GB tariffs as available to pack with fibers
- [#1069](https://git.coopdevs.org/coopdevs/som-connexio/odoo-somconnexio/-/merge_requests/1069) Add shared bond one shot and one shot API

Related card: https://trello.com/c/7H4Gvlma/1958-release-odoo-120290

---