[jfx24u] RFR: 8350437: [GHA] Update gradle wrapper-validation action to v3

[Kevin Rushforth]

Clean backport of GHA-only fix to jfx24u.

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Commit messages:
 - Backport 163bf6d42fde7de0454695311746964ff6bc1f49

Changes: https://git.openjdk.org/jfx24u/pull/8/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx24u&pr=8&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8350437
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jfx24u/pull/8.diff
  Fetch: git fetch https://git.openjdk.org/jfx24u.git pull/8/head:pull/8

PR: https://git.openjdk.org/jfx24u/pull/8