Editorial change: update copyright year

Author: gusthoff

content/courses/ada-idioms/index.rst

@@ -25,7 +25,7 @@ Ada Idioms
 
     .. container:: content-copyright
 
-        Copyright © 2024, AdaCore
+        Copyright © 2025, AdaCore
 
         This book is published under a CC BY-SA license, which means that you
         can copy, redistribute, remix, transform, and build upon the content