git: openjdk/jdk21u-dev: master: 8328812: Update and move siphash license

[Andrew Lu]

Changeset: 6791646b
Author:    Andrew Lu <andrewlu at openjdk.org>
Date:      2024-04-01 01:57:12 +0000
URL:       https://git.openjdk.org/jdk21u-dev/commit/6791646b9f9673ea36a67e5af7584929dfb16069

8328812: Update and move siphash license

Backport-of: ce7ebaa606f96fdfee66d300b56022d9903b5ae3

= src/java.base/share/legal/siphash.md