v1.15 help files

Author: Nelson-numerical-software

docs/releases/fr_FR/v1.15.0/CHANGELOG.html

@@ -42,7 +42,7 @@ <h1>Changelog</h1>
 <p>All notable changes to this project will be documented in this file.</p>
 <p>The format is based on <a href="https://keepachangelog.com/en/1.0.0/">Keep a Changelog</a>,
 and this project adheres to <a href="https://semver.org/spec/v2.0.0.html">Semantic Versioning</a>.</p>
-<h2>1.15.0 - (UNRELEASED)</h2>
+<h2>1.15.0 - (2025-11-21)</h2>
 <p>Starting with v1.15, Nelson for Windows is officially signed with a Certum-issued code-signing certificate.
 This is a major security milestone, ensuring the authenticity and integrity of Nelson’s Windows releases.</p>
 <p>Nelson remains a non-profit, community-driven project.