refactor: re-home fasthtml to Web Frameworks > Asynchronous

Maintainer-adjudicated close of the standing flag: fasthtml runs on
Starlette and Uvicorn (ASGI), so Synchronous was the wrong shelf. It
lands as a third challenger behind starlette and tornado's obvious
choices — the use case holds 5 with 3 challengers by explicit
maintainer override (Async I/O precedent; the awesome-fasthtml
sub-item rides along). 1.19M downloads/month as python-fasthtml.

Co-Authored-By: Claude <noreply@anthropic.com>

README.md

@@ -251,13 +251,13 @@ _Traditional full stack web frameworks. Also see [Web APIs](#web-apis)._
   - [bottle](https://github.com/bottlepy/bottle) - A fast and simple micro-framework distributed as a single file with no dependencies.
   - [pyramid](https://github.com/Pylons/pyramid) - A small, fast, down-to-earth, open source Python web framework.
     - [awesome-pyramid](https://github.com/uralbash/awesome-pyramid)
-  - [fasthtml](https://github.com/AnswerDotAI/fasthtml) - The fastest way to create an HTML app.
-    - [awesome-fasthtml](https://github.com/amosgyamfi/awesome-fasthtml)
 - Asynchronous
   - [starlette](https://github.com/Kludex/starlette) - A lightweight ASGI framework and toolkit for building high-performance async services.
   - [tornado](https://github.com/tornadoweb/tornado) - A web framework and asynchronous networking library.
   - [litestar](https://github.com/litestar-org/litestar) - Production-ready, capable and extensible ASGI Web framework.
   - [reflex](https://github.com/reflex-dev/reflex) - A framework for building reactive, full-stack web applications entirely with Python.
+  - [fasthtml](https://github.com/AnswerDotAI/fasthtml) - The fastest way to create an HTML app.
+    - [awesome-fasthtml](https://github.com/amosgyamfi/awesome-fasthtml)
 
 ### Web APIs