Update to actions/checkout@v3 (#26)

Author: mpdude

.github/workflows/dependencies.yml

@@ -21,7 +21,7 @@ jobs:
                 with:
                   php-version: ${{ env.PHP_VERSION }}
                   tools: composer:v2
-            -   uses: actions/checkout@v2
+            -   uses: actions/checkout@v3
             -   uses: actions/cache@v2
                 with:
                     path: vendor

.github/workflows/fix-cs-php.yml

@@ -16,7 +16,7 @@ jobs:
         if: github.actor != 'dependabot[bot]'
         steps:
             -   name: Checkout code
-                uses: actions/checkout@v2
+                uses: actions/checkout@v3
                 with:
                     ref: ${{ github.head_ref }}
 

.github/workflows/tests.yml

@@ -22,7 +22,7 @@ jobs:
                     - { php-version: 8.1, symfony-locked-version: none, dependency-version: prefer-stable }
         name: PHPUnit (PHP ${{matrix.php-version}}, Symfony Version Lock ${{ matrix.symfony-locked-version }}, ${{ matrix.dependency-version }})
         steps:
-            -   uses: actions/checkout@v2
+            -   uses: actions/checkout@v3
             -   uses: shivammathur/setup-php@v2
                 with:
                   php-version: ${{ matrix.php-version }}