更新 testing.yaml，移除对 PHP 8.1 和 Laravel 10 的支持

Author: huangdijia

.github/workflows/testing.yaml

@@ -19,13 +19,8 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        php: ['8.4', '8.3', '8.2', '8.1']
-        laravel: [10, 11, '12']
-        exclude:
-          - php: 8.1
-            laravel: 11
-          - laravel: '12'
-            php: '8.1'
+        php: ['8.4', '8.3', '8.2']
+        laravel: ['12', '11']
       max-parallel: 36
 
     steps: