update architecture.rst documentation

Author: salty-ivy

docs/architecture.rst

@@ -79,6 +79,10 @@ Problematic Parts
   when the panel module is loaded
 - ``debug.panels.sql``: This package is particularly complex, but provides
   the main benefit of the toolbar
-- Support for async and multi-threading: This is currently unsupported, but
-  is being implemented as per the
-  `Async compatible toolbar project <https://github.com/orgs/jazzband/projects/9>`_.
+- Support for async and multi-threading: ``debug_toolbar.middleware.DebugToolbarMiddleware``
+  is now async compatible and can process ASGI requests. However certain
+  panels such as ``SQLPanel``, ``TimerPanel``,  ``StaticFilesPanel``,
+  ``RequestPanel``, ``RedirectsPanel`` and ``ProfilingPanel`` aren't fully
+  compatible and currently being worked on. For now, these panels
+  are disabled by default when running in async/ASGI enviroment.
+  follow the progress of this issue in `Async compatible toolbar project <https://github.com/orgs/jazzband/projects/9>`_.