github-actions(deps): bump actions/checkout from 2.4.0 to 3

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.4.0 to 3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2.4.0...v3)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/validate-code.yml

@@ -16,7 +16,7 @@ jobs:
         php: [ "8.0" ]
     steps:
       - name: Checkout
-        uses: actions/checkout@v2.4.0
+        uses: actions/checkout@v3
 
       - name: Setup PHP
         uses: shivammathur/setup-php@2.17.0
@@ -41,7 +41,7 @@ jobs:
         os: [ "ubuntu-latest" ]
     steps:
       - name: Checkout
-        uses: actions/checkout@v2.4.0
+        uses: actions/checkout@v3
 
       - name: Setup PHP
         uses: shivammathur/setup-php@2.17.0
@@ -69,7 +69,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2.4.0
+        uses: actions/checkout@v3
 
       - name: Setup PHP
         uses: shivammathur/setup-php@2.17.0