git: openjdk/jdk-sandbox: jep486: Add missing class description.

[duke]

Changeset: 09b6cd60
Branch: jep486
Author:    Sean Mullan <sean.mullan at oracle.com>
Date:      2024-10-26 15:12:20 +0000
URL:       https://git.openjdk.org/jdk-sandbox/commit/09b6cd602c1f2c7998ed824878c5f5f43be69075

Add missing class description.

! src/java.base/share/classes/java/security/AccessControlException.java
! src/java.base/share/classes/java/security/Policy.java