RFR: 7903850: JCStress: Upgrade GitHub Action Runner image for macOS [v2]

[Johnny Lim]

> This PR upgrades GitHub Action Runner image for macOS to `macos-12` as `macos-11` seems to have been removed.
> 
> See https://github.com/actions/runner-images?tab=readme-ov-file#available-images and https://github.com/actions/runner-images/issues/9255

Johnny Lim has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:

  Upgrade GitHub Action Runner image for macOS to macos-13

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Changes:
  - all: https://git.openjdk.org/jcstress/pull/152/files
  - new: https://git.openjdk.org/jcstress/pull/152/files/207580f9..b33edc67

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jcstress&pr=152&range=01
 - incr: https://webrevs.openjdk.org/?repo=jcstress&pr=152&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jcstress/pull/152.diff
  Fetch: git fetch https://git.openjdk.org/jcstress.git pull/152/head:pull/152

PR: https://git.openjdk.org/jcstress/pull/152