add website

Author: carlosthe19916

README.md

@@ -2,6 +2,8 @@
 [![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=project-openubl_xbuilder&metric=alert_status)](https://sonarcloud.io/dashboard?id=project-openubl_xbuilder)
 [![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.aichem.org%2Fproject-openubl%2Fxbuilder.svg?type=shield)](https://app.fossa.com/projects/git%2Bgithub.aichem.org%2Fproject-openubl%2Fxbuilder?ref=badge_shield)
 
+## **https://project-openubl.github.io/xbuilder-docs/**
+
 # XBuilder
 
 Java library for creating XML files based on UBL standards.