Fix PHPCS cs2pr setup

Ref: https://github.com/staabm/annotate-pull-request-from-checkstyle?tab=readme-ov-file#example-githubaction-workflow

.github/workflows/phpcs.yml

@@ -22,13 +22,13 @@ jobs:
     name: PHPCS
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - name: Install dependencies
-        run: composer install --dev --prefer-dist --no-progress --no-suggest
+      - uses: actions/checkout@v4
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
           php-version: '7.2'
           tools: cs2pr
+      - name: Install dependencies
+        run: composer install --dev --prefer-dist --no-progress --no-suggest
       - name: Run phpcs
         run: ./vendor/bin/phpcs -q --report=checkstyle | cs2pr