docs: update copyright year to 2026 in appendix-auth-modules.adoc

Agent-Logs-Url: https://github.com/OpenIdentityPlatform/OpenIDM/sessions/8ae6a531-3685-4c29-aa93-1339c306f02b

Co-authored-by: vharseko <6818498+vharseko@users.noreply.github.com>

Author: Copilot

openidm-doc/src/main/asciidoc/integrators-guide/appendix-auth-modules.adoc

@@ -12,7 +12,7 @@
   information: "Portions copyright [year] [name of copyright owner]".
 
   Copyright 2017 ForgeRock AS.
-  Portions Copyright 2024-2025 3A Systems LLC.
+  Portions Copyright 2024-2026 3A Systems LLC.
 ////
 
 :figure-caption!: