[jfx24u] RFR: 8354337: GHA: Windows build fails with chmod permission error

[Kevin Rushforth]

Clean backport of GHA Windows fix to jfx24u.

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Commit messages:
 - Backport 8a61dd2b808e1fa691150d01eafd2697d0d1c56d

Changes: https://git.openjdk.org/jfx24u/pull/20/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx24u&pr=20&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8354337
  Stats: 15 lines in 2 files changed: 11 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jfx24u/pull/20.diff
  Fetch: git fetch https://git.openjdk.org/jfx24u.git pull/20/head:pull/20

PR: https://git.openjdk.org/jfx24u/pull/20