[jdk21] RFR: 8310182: DateTimeFormatter date formats (ISO_LOCAL_DATE) separated with hyphen, not dash

Tue Jun 27 17:15:10 UTC 2023

Hi all,

This pull request contains a backport of commit [ec45bd64](https://github.com/openjdk/jdk/commit/ec45bd64d504d579aef54c924fb8ca75a944036f) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Naoto Sato on 27 Jun 2023 and was reviewed by Roger Riggs, Joe Darcy, Iris Clark and Lance Andersen.

Thanks!

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Commit messages:
 - Backport ec45bd64d504d579aef54c924fb8ca75a944036f

Changes: https://git.openjdk.org/jdk21/pull/70/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21&pr=70&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310182
  Stats: 6 lines in 1 file changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jdk21/pull/70.diff
  Fetch: git fetch https://git.openjdk.org/jdk21.git pull/70/head:pull/70

PR: https://git.openjdk.org/jdk21/pull/70