Fix workflow dependencies for Pest v4 and Testbench

- Use only PHP 8.3 (Pest v4 plugins require ^8.3)
- Laravel 11 uses Testbench 9.*
- Laravel 12 uses Testbench 10.*

Author: Baspa

.github/workflows/run-tests.yml

@@ -13,12 +13,12 @@ jobs:
       fail-fast: true
       matrix:
         os: [ubuntu-latest, windows-latest]
-        php: [8.3, 8.2]
+        php: [8.3]
         laravel: [11.*, 12.*]
         stability: [prefer-lowest, prefer-stable]
         include:
           - laravel: 11.*
-            testbench: 10.*
+            testbench: 9.*
             carbon: 3.*
           - laravel: 12.*
             testbench: 10.*