Fix: unable to run tests against laravel 11

GitHub actions throws exceptions for unkown utf8mb4_0900_ai_ci which is the new default in Laravel 11.
laravel/framework#48455

.github/workflows/main.yml

@@ -31,7 +31,7 @@ jobs:
 
         services:
             mysql:
-                image: mysql:5.7
+                image: mysql:8.0
                 env:
                     MYSQL_ALLOW_EMPTY_PASSWORD: yes
                     MYSQL_DATABASE: laravel-database-trigger