Withdrawn: Gradle 8.11.1 update cleanups

[duke]

On Mon, 13 Jan 2025 18:14:03 GMT, Jorn Vernee <jvernee at openjdk.org> wrote:

> Some things were missed as part of: https://github.com/openjdk/jextract/pull/264
> 
> - The action to validate the gradle wrapper accidentally uses a deprecated version
> - The readme was not updated.

This pull request has been closed without being integrated.

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PR: https://git.openjdk.org/jextract/pull/272