[UPD] addons table in README.md

Author: OCA-git-bot

README.md

@@ -25,6 +25,7 @@ addon | version | maintainers | summary
 [account_invoice_check_total](account_invoice_check_total/) | 16.0.1.0.0 |  | Check if the verification total is equal to the bill's total
 [account_invoice_fiscal_position_update](account_invoice_fiscal_position_update/) | 16.0.1.0.0 | [![alexis-via](https://github.com/alexis-via.png?size=30px)](https://github.com/alexis-via) | Changing the fiscal position of an invoice will auto-update invoice lines
 [account_invoice_tax_required](account_invoice_tax_required/) | 16.0.1.0.0 |  | This module adds functional a check on invoice to force user to set tax on invoice line.
+[account_invoice_triple_discount](account_invoice_triple_discount/) | 16.0.1.0.0 |  | Manage triple discount on invoice lines
 
 [//]: # (end addons)