Prepare release-note for Order Manager

Order-Manager/release-note.md

 ---
 title: Release note
 subtitle: Order Manager
-toolversion: 5.3.2
-releasedate: 2021-11-23
+toolversion: 6.0.0
+releasedate: 2023-12-01
 author: Anne-Gaëlle BERGE
 function: Software Engineer
 customer: IHE Europe
 reference: KER1-RNO-IHE-ORDER_MANAGER
 ---
+# 6.0.0
+_Release date: 2023-12-01_
+
+__Task__
+* \[[OM-367](https://gazelle.ihe.net/jira/browse/OM-367)\] Integrate new sso-client-v7
+* \[[OM-368](https://gazelle.ihe.net/jira/browse/OM-368)\] Remove username display in GUI
+
 # 5.3.2
 _Release date: 2021-11-23_