RFR: 8358634: RISC-V: Fix several broken documentation web-links

[duke]

On Thu, 5 Jun 2025 03:08:14 GMT, Dingli Zhang <dzhang at openjdk.org> wrote:

> Hi all,
> Please take a look and review this PR, thanks!
> 
> Several RISC-V related documentation web-links are broken.
> This PR updates the web-links.

@DingliZhang 
Your change (at version bc6c9bd6bf22860b12cf865a282c85d736cd5d76) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/jdk/pull/25652#issuecomment-2943003076