Release Note: Restoring Previous `user.dir` Property Behaviour

A change, JDK-8194154, was introduced in the 8u342 release of OpenJDK, causing the JDK to ignore attempts to set the `user.dir` property. While this change is suitable for a major release (it was originally introduced in the initial release of OpenJDK 11), changing the behaviour of such a property in an update release creates compatibility issues in software that relies on the behaviour in prior versions of OpenJDK 8. As a result, we have reverted this change in 8u345.