Make PHP 8.3 the default version in tests (#1643)

Author: jderusse

.github/workflows/checks.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Install PHP with extensions
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 8.2
+          php-version: 8.3
           tools: composer:v2
 
       - name: Install roave/backward-compatibility-check