Update dependency barryvdh/laravel-debugbar to v3.6.8

Author: renovate[bot]

composer.json

@@ -18,7 +18,7 @@
         "laravel/tinker": "2.7.2"
     },
     "require-dev": {
-        "barryvdh/laravel-debugbar": "3.6.7",
+        "barryvdh/laravel-debugbar": "3.6.8",
         "barryvdh/laravel-ide-helper": "2.12.3",
         "facade/ignition": "2.17.6",
         "fakerphp/faker": "1.19.0",