linux: Add 0.1.5 release to metainfo

Author: wjt

linux/releases.xml

@@ -4,6 +4,9 @@ SPDX-FileCopyrightText: The Threadbare Authors
 SPDX-License-Identifier: CC-BY-4.0
 -->
 <releases>
+  <release version="0.1.5" date="2025-10-10">
+    <url type="details">https://github.com/endlessm/threadbare/releases/tag/v0.1.5</url>
+  </release>
   <release version="0.1.4" date="2025-09-12">
     <url type="details">https://github.com/endlessm/threadbare/releases/tag/v0.1.4</url>
   </release>