update copyright (#35)

Signed-off-by: kerthcet <kerthcet@gmail.com>

Author: kerthcet

config/_default/menus/menus.en.toml

@@ -80,7 +80,7 @@
 #   weight = 30
 
 [[footer]]
-  name = "Copyright © 2026 InftyAI."
+  name = "Copyright © 2023-2026 InftyAI. All Rights Reserved."
   weight = 10
 
 # [[footer]]