Update CHANGELOG

Author: gfrn

CHANGELOG.rst

@@ -7,6 +7,15 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
++++++++++
+v0.18.0 (21/11/2025)
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+
+**Added**
+
+- Add sessions endpoint
+- Add endpoint to get shipments in a given proposal
+
 +++++++++
 v0.17.0 (05/11/2025)
 +++++++++