message: docs(standalone-toast): update usage
diff: @@ -223,9 +223,9 @@ Components.
  ```js
  import { createStandaloneToast } from "@chakra-ui/core"
  -import theme from "@chakra-ui/theme"
  -const toast = createStandaloneToast({ theme })
  +const toast = createStandaloneToast()
  +// const customToast = createStandaloeToast({ theme: yourCustomTheme })
  toast({
  title: "An error occurred.",
  