vkconfig: Update readme copyright

Change-Id: I67eb66ee7f8891043b408c8a3d50eabab3639a04

Author: christophe-lunarg

vkconfig_gui/README.md

@@ -1,6 +1,6 @@
 <!-- markdownlint-disable MD041 -->
 <p align="left"><img src="https://vulkan.lunarg.com/img/NewLunarGLogoBlack.png" alt="LunarG" width=263 height=113 /></p>
-<p align="left">Copyright &copy; 2015-2025 LunarG, Inc.</p>
+<p align="left">Copyright &copy; 2015-2026 LunarG, Inc.</p>
 
 [![Creative Commons][3]][4]