Build/Test Tools: Update third-party GitHub Actions.

This updates the following third-party actions to their latest versions:

- `actions/cache`
- `actions/checkout`
- `actions/setup-node`
- `actions/github-script`
- `slackapi/slack-github-action`

The latest versions of these actions fix the warnings that are being triggered after the deprecation of `set-output` and `save-state` on GitHub Actions.

For more information, see https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/.

See #56820.

git-svn-id: https://develop.svn.wordpress.org/trunk@54511 602fd350-edb4-49c9-b593-d223f7449a82

.github/workflows/phpunit-tests.yml

@@ -106,10 +106,10 @@ jobs:
           echo "PHP_FPM_GID=$(id -g)" >> $GITHUB_ENV
 
       - name: Checkout repository
-        uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b # v3.0.2
+        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v3.1.0
 
       - name: Install NodeJS
-        uses: actions/setup-node@969bd2663942d722d85b6a8626225850c2f7be4b # v3.5.0
+        uses: actions/setup-node@8c91899e586c5b171469028077307d293428b516 # v3.5.1
         with:
           node-version-file: '.nvmrc'
           cache: npm
@@ -128,7 +128,7 @@ jobs:
         run: echo "::set-output name=dir::$(composer config cache-files-dir)"
 
       - name: Cache Composer dependencies
-        uses: actions/cache@56461b9eb0f8438fd15c7a9968e3c9ebb18ceff1 # v3.0.10
+        uses: actions/cache@9b0c1fce7a93df8e3bb8926b0d6e9d89e92f20a7 # v3.0.11
         env:
           cache-name: cache-composer-dependencies
         with:
@@ -216,7 +216,7 @@ jobs:
 
       - name: Checkout the WordPress Test Reporter
         if: ${{ github.repository == 'WordPress/wordpress-develop' && github.ref == 'refs/heads/trunk' && matrix.report }}
-        uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b # v3.0.2
+        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v3.1.0
         with:
           repository: 'WordPress/phpunit-test-runner'
           path: 'test-runner'
@@ -255,7 +255,7 @@ jobs:
 
     steps:
       - name: Dispatch workflow run
-        uses: actions/github-script@7dff1a87643417cf3b95bb10b29f4c4bc60d8ebd # v6.3.1
+        uses: actions/github-script@100527700e8b29ca817ac0e0dfbfc5e8ff38edda # v6.3.2
         with:
           retries: 2
           retry-exempt-status-codes: 418