Clean up and fix API routes.

app/Api/V2/Controllers/Model/BudgetLimit/ListController.php

@@ -48,6 +48,8 @@ class ListController extends Controller
     }
 
     /**
+     * This endpoint is documented at:
+     * https://api-docs.firefly-iii.org/?urls.primaryName=2.0.0%20(v2)#/budgets/listBudgetLimitByBudget
      * @return JsonResponse
      */
     public function index(DateRequest $request, Budget $budget): JsonResponse