Update GitHub Actions for Laravel 12

Author: laravel-shift

.github/workflows/run-tests.yml

@@ -12,13 +12,15 @@ jobs:
       fail-fast: true
       matrix:
         php: [8.4, 8.3, 8.2]
-        laravel: ["10.*", "11.*"]
+        laravel: ['10.*', '11.*', '12.*']
         dependency-version: [prefer-lowest, prefer-stable]
         include:
           - laravel: 10.*
             testbench: 8.*
           - laravel: 11.*
             testbench: 9.*
+          - laravel: 12.*
+            testbench: 10.*
 
     name: P${{ matrix.php }} - L${{ matrix.laravel }} - ${{ matrix.dependency-version }}