[jdk25u] RFR: 8362501: Update test/hotspot/jtreg/applications/jcstress/README

[SendaoYan]

On Thu, 31 Jul 2025 01:40:44 GMT, SendaoYan <syan at openjdk.org> wrote:

> Hi all,
> 
> This pull request contains a backport of commit [559795b0](https://github.com/openjdk/jdk/commit/559795b0eb8061325127fa9fdf8b80617fe47166) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by SendaoYan on 31 Jul 2025 and was reviewed by Aleksey Shipilev and Leonid Mesnik.
> 
> Thanks!

GHA report 2 failures are all unrelated to this backport PR.

1. linux-cross-compile / build s390x fails at 'Create Sysroot' stage, it seems like infrastructure issue
2. linux-cross-compile / build ppc64le fails at 'Create Sysroot' stage, it seems like infrastructure issue

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PR Comment: https://git.openjdk.org/jdk25u/pull/54#issuecomment-3138904704