Update test matrix to use Testbench 10 for Laravel 12 compatibility

Author: rokde

.github/workflows/run-tests.yml

@@ -22,7 +22,7 @@ jobs:
         stability: [prefer-lowest, prefer-stable]
         include:
           - laravel: 12.*
-            testbench: 8.*
+            testbench: 10.*
             carbon: ^2.63
 
     name: P${{ matrix.php }} - L${{ matrix.laravel }} - ${{ matrix.stability }} - ${{ matrix.os }}