Jason Lu

Only 1 block of linked_dashboard is allowed

1

According to the [official document](https://registry.terraform.io/providers/SumoLogic/sumologic/latest/docs/resources/dashboard#schema-for-sumo_search_panel), linked_dashboard should be a block list, however, it's reporting ``` ╷ │ Error: Too many linked_dashboard blocks │ │ on dashboards.tf line 338, in resource...