File fix.patch of Package plasma6-applet-window-buttons

--- CMakeLists.txt      2026-01-28 18:44:09.230118003 +0800
+++ CMakeLists.txt      2026-01-28 18:44:16.931606740 +0800
@@ -3,7 +3,7 @@
 cmake_minimum_required(VERSION 3.20 FATAL_ERROR)
 project(applet_windowbuttons)
 
-set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD 23)
 set(VERSION 0.12.0)
 set(AUTHOR "Michail Vourlakos")
 set(EMAIL "mvourlakos@gmail.com")