appengine-gradle-plugin:2.5.0 throws an error with Gradle 8.5

[julienvillegas]

Following example article:
https://cloud.google.com/appengine/docs/standard/java-gen2/using-gradle

Using plugin version: com.google.cloud.tools:appengine-gradle-plugin:2.5.0
with Gradle 8.5

produces the following error:
The Project.getConvention() method has been deprecated. This is scheduled to be removed in Gradle 9.0. Consult the upgrading guide for further information: https://docs.gradle.org/8.5/userguide/upgrading_version_8.html#deprecated_access_to_conventions

I think this use to be a warning. This is now throwing an error.