Update content/pages/download.md

Co-authored-by: Daniel Schürmann <daschuer@mixxx.org>

Author: acolombier

content/pages/download.md

@@ -3,7 +3,7 @@ title: Download
 template: pages/download
 versions:
   stable:
-    name: 2.5.
+    name: 2.5.6
     release_announcement: /news/2025-12-14-mixxx-2_5_5-released/
     download_manifest: https://downloads.mixxx.org/releases/2.5.4/manifest.json
     downloads: