Only test with PhpUnit 10

Author: stefanzweifel

.github/workflows/tests.yml

@@ -11,7 +11,7 @@ jobs:
       matrix:
         php: [8.2, 8.3]
         laravel: [11.*]
-        phpunit: [10.*, 11.*]
+        phpunit: [10.*]
         stability: [prefer-lowest, prefer-stable]
         include:
           - laravel: 11.*