Build/Test Tools: Pin a specific commit for Hosting Test Reporter.

An upstream change in the Hosting Test Reporter is causing failures in the PHPUnit workflow. This temporarily pins an older hash to the step that checks the reporter out.

Props youknowriad.
See #59647.

git-svn-id: https://develop.svn.wordpress.org/trunk@57551 602fd350-edb4-49c9-b593-d223f7449a82

.github/workflows/phpunit-tests-run.yml

@@ -177,6 +177,7 @@ jobs:
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           repository: 'WordPress/phpunit-test-runner'
+          ref: '1b1398b92a5119dcdbfb40669b26f6c63cd65653'
           path: 'test-runner'
           show-progress: ${{ runner.debug == '1' && 'true' || 'false' }}