[valhalla-docs] Integrated: site/_index.md: Fix JEP 401 link

[Christopher Sahnwaldt]

On Sun, 21 Dec 2025 18:28:24 GMT, Christopher Sahnwaldt <duke at openjdk.org> wrote:

> typo: link should point to 401, not 390

This pull request has now been integrated.

Changeset: 7bb7fda9
Author:    Christopher Sahnwaldt <jcsahnwaldt at gmail.com>
Committer: Chen Liang <liach at openjdk.org>
URL:       https://git.openjdk.org/valhalla-docs/commit/7bb7fda9237f7c59bbb18e189a3dbd751c35cebb
Stats:     1 line in 1 file changed: 0 ins; 0 del; 1 mod

site/_index.md: Fix JEP 401 link

Reviewed-by: liach

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PR: https://git.openjdk.org/valhalla-docs/pull/15