ci: run cs-fixer on php 8.3

Author: tobimori

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: "8.4"
+          php-version: "8.3"
           tools: php-cs-fixer
 
       - name: Setup Node.js