RFR: Merge openjdk/jdk21u-dev:master [v5]

[William Kemper]

> Merges tag jdk-21.0.3+1

William Kemper has updated the pull request incrementally with one additional commit since the last revision:

  Fix whitespace

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Changes:
  - all: https://git.openjdk.org/shenandoah-jdk21u/pull/19/files
  - new: https://git.openjdk.org/shenandoah-jdk21u/pull/19/files/3b76ed75..af5fd615

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=shenandoah-jdk21u&pr=19&range=04
 - incr: https://webrevs.openjdk.org/?repo=shenandoah-jdk21u&pr=19&range=03-04

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/shenandoah-jdk21u/pull/19.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah-jdk21u.git pull/19/head:pull/19

PR: https://git.openjdk.org/shenandoah-jdk21u/pull/19