git: openjdk/amber-docs: Updating for JDK 25

[duke]

Changeset: d5a84e5b
Branch: master
Author:    Gavin Bierman <gavin.bier...@oracle.com>
Date:      2025-09-22 22:45:04 +0000
URL:       
https://git.openjdk.org/amber-docs/commit/d5a84e5bcbf6c50ca2dbcf05bc38feb2345bfc6b

Updating for JDK 25

! site/_index.md