github-actions(deps): bump actions/checkout from 2 to 3

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v3)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/pre-release-tests.yml

@@ -18,7 +18,7 @@ jobs:
                 php-versions: ['7.4', '8.0']
         name: integration-tests-against-rc (PHP ${{ matrix.php-versions }})
         steps:
-            -   uses: actions/checkout@v2
+            -   uses: actions/checkout@v3
             -   name: Install PHP
                 uses: shivammathur/setup-php@v2
                 with:

.github/workflows/tests.yml

@@ -29,7 +29,7 @@ jobs:
                       sf-version: '6.0.*'
         name: integration-tests (PHP ${{ matrix.php-version }})
         steps:
-            -   uses: actions/checkout@v2
+            -   uses: actions/checkout@v3
             -   name: Install PHP
                 uses: shivammathur/setup-php@v2
                 with:
@@ -50,7 +50,7 @@ jobs:
         runs-on: ubuntu-latest
         name: 'Code style'
         steps:
-            -   uses: actions/checkout@v2
+            -   uses: actions/checkout@v3
 
             -   name: Install PHP
                 uses: shivammathur/setup-php@v2