CHANGELOG: Add missing description of changes to rules

Author: bertrand-lorentz

CHANGELOG.md

@@ -1,8 +1,16 @@
 # SDK 1.11.2 Release Notes
 
+This release brings the following corrections in the validation rules, making them more permissive:
+
+* Do not require the organisation identifier (BT-501-Organization-Company) to be unique in the notice.
+* Allow the buyer and tenderer organisations to also be a service provider.
+
 This release brings the following corrections in the notice visualisation templates:
 
 * Add back the display of BT-748-Lot for all relevant notice subtypes. It was incorrectly removed in the previous version.
+
+This release also includes updated translations and updated notice visualisation templates.
+
 A comprehensive list of changes between SDK 1.11.1 and SDK 1.11.2 can be seen at <https://github.com/OP-TED/eForms-SDK/compare/1.11.1...1.11.2>
 
 You can explore the changes between those versions at <https://docs.ted.europa.eu/eforms-sdk-explorer?base=1.11.0&version=1.11.1>