Build/Test Tools: Update 3rd party GitHub Actions.

This updates the following GitHub Actions to the latest versions:

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

See #55652.

git-svn-id: https://develop.svn.wordpress.org/trunk@53581 602fd350-edb4-49c9-b593-d223f7449a82

.github/workflows/php-compatibility.yml

@@ -57,10 +57,10 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579 # v2.4.0
+        uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b # v3.0.2
 
       - name: Set up PHP
-        uses: shivammathur/setup-php@d37cc3048580de06099c81ded417530716a0d7ab # v2.18.0
+        uses: shivammathur/setup-php@3eda58347216592f618bb1dff277810b6698e4ca # v2.19.1
         with:
           php-version: '7.4'
           coverage: none
@@ -78,7 +78,7 @@ jobs:
         run: echo "::set-output name=date::$(/bin/date -u --date='last Mon' "+%F")"
 
       - name: Cache PHP compatibility scan cache
-        uses: actions/cache@136d96b4aee02b1f0de3ba493b1d47135042d9c0 # v3.0.1
+        uses: actions/cache@136d96b4aee02b1f0de3ba493b1d47135042d9c0 # v3.0.4
         with:
           path: .cache/phpcompat.json
           key: ${{ runner.os }}-date-${{ steps.get-date.outputs.date }}-phpcompat-cache-${{ hashFiles('**/composer.json', 'phpcompat.xml.dist') }}