Bump version to 21.0.12 - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai).
------------- Commit messages: - Bump version to 21.0.12 Changes: https://git.openjdk.org/jfx21u/pull/123/files Webrev: https://webrevs.openjdk.org/?repo=jfx21u&pr=123&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8382869 Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod Patch: https://git.openjdk.org/jfx21u/pull/123.diff Fetch: git fetch https://git.openjdk.org/jfx21u.git pull/123/head:pull/123 PR: https://git.openjdk.org/jfx21u/pull/123
