fix typo

Author: ousid

.github/workflows/run-tests.yml

@@ -20,7 +20,7 @@ jobs:
           - laravel: 8.*
             testbench: ^6.23
           - laravel: 9.*
-            testbench: ^7.*
+            testbench: 7.*
 
     name: P${{ matrix.php }} - L${{ matrix.laravel }} - ${{ matrix.stability }} - ${{ matrix.os }}