fix(ci): upgrade minimum workbench version for prefer-lowest tests

Author: ace-of-aces

composer.json

@@ -24,7 +24,7 @@
         "laravel/pint": "^1.14",
         "league/flysystem-aws-s3-v3": "^3.0",
         "nunomaduro/collision": "^8.8",
-        "orchestra/testbench": "^10.0.0||^9.0.0",
+        "orchestra/testbench": "^10.6.0||^9.0.0",
         "pestphp/pest": "^4.0",
         "pestphp/pest-plugin-arch": "^4.0",
         "pestphp/pest-plugin-laravel": "^4.0",