chore: Update version to 6.0.15

 - update version to 6.0.15

 log: update version to 6.0.15

Author: dengzhongyuan365-dev

debian/changelog

@@ -1,3 +1,9 @@
+deepin-fcitx5configtool-plugin (6.0.15) unstable; urgency=medium
+
+  * chore: Add new Lao translation file
+
+ -- dengzhongyuan <dengzhongyuan@uniontech.com>  Thu, 07 Aug 2025 17:47:09 +0800
+
 deepin-fcitx5configtool-plugin (6.0.14) unstable; urgency=medium
 
   * add single instance lock mechanism for fcitx5-helper