message: docs(Navigation): add demo link
diff: @@ -107,6 +107,7 @@ documentation on all components and styles, visit [GetTerminus.github.io/terminu
  | link | | :white_check_mark: | [Demo][demo-link] |
  | login form | | :white_check_mark: | [Demo][demo-login-form] |
  | menu | | :white_check_mark: | [Demo][demo-menu] |
  +| navigation | | :white_check_mark: | [Demo][demo-navigation] |
  | pagination | | :white_check_mark: | [Demo][demo-pagination] |
  | picklist | | :x: | |
  | progress | | :x: | |
  @@ -586,5 +587,5 @@ machines.
  [demo-pagination]: https://embed.plnkr.co/plunk/HHnqCzyj0ks05ahD?show=app,preview
  [demo-select]: https://embed.plnkr.co/plunk/v2ey7q6Hl2jr2KIw?show=app,preview
  [demo-toggle]: https://embed.plnkr.co/plunk/lRsheSRvzEBuXjiP?show=app,preview
  -
  +[demo-navigation]: https://embed.plnkr.co/plunk/uvwbjzzBcglSa0mw?show=app,preview
  