Updated _Sidebar (markdown)

_Sidebar.md

@@ -5,13 +5,8 @@
  - [[Quickstart]]
  - [[Install]]
  - [[Docker]]
- - [[Usage]]
-
-# Reference
-
  - 📥 [Supported Sources](https://github.com/ArchiveBox/ArchiveBox/wiki/Quickstart#2-get-your-list-of-urls-to-archive)
  - 📤 [Supported Outputs](https://github.com/ArchiveBox/ArchiveBox#output-formats)
-
  - [[Usage]]
    - ﹩[Command Line](../Usage)
    - 🌐 [Web UI](../Usage)
@@ -19,13 +14,14 @@
    - 📜 [Python Library](https://docs.archivebox.io/en/latest/modules.html) / [Python Shell](../Usage) 
    - 👾 [REST API](https://github.com/ArchiveBox/ArchiveBox/issues/496) / [SQL API](../Usage)
 
+# Reference
+
  - ⚙️ [[Configuration]]
  - 🔒 [[Security Overview]]
  - 💿 [Disk Layout]()
  - 📦 [Dependencies]()
  - 📝 [Developer Documentation](https://github.com/ArchiveBox/ArchiveBox#archivebox-development)
 
-
 # Guides
 
  - [[Troubleshooting]]