Fixed CI version constraint for Laravel 12.x-dev

Author: fulopattila122

.github/workflows/tests.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       matrix:
         php: ['8.2', '8.3', '8.4']
-        laravel: ['11.0', '11.37', '12.0']
+        laravel: ['11.0', '11.37', '12.x']
     name: PHP ${{ matrix.php }} Laravel ${{ matrix.laravel }}
     steps:
       - name: Checkout