[jdk11u] RFR: 8287378: GHA: Update cygwin to fix issues in langtools tests on Windows

[Christoph Langer]

Needed to resolve manually since jdk11u-dev does not have Windows/Arm64.

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Commit messages:
 - Backport f086d945c31d3673e0a49017e3d4e99b189253fe

Changes: https://git.openjdk.java.net/jdk11u/pull/39/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u&pr=39&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8287378
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk11u/pull/39.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u pull/39/head:pull/39

PR: https://git.openjdk.java.net/jdk11u/pull/39