Add ApitallyMiddleware to third party middleware section

docs/middleware.md

@@ -571,7 +571,7 @@ import time
 class MonitoringMiddleware:
     def __init__(self, app):
         self.app = app
-    
+
     async def __call__(self, scope, receive, send):
         start = time.time()
         try:
@@ -725,6 +725,11 @@ If you do want to apply the middleware logic to error responses only on some rou
 
 ## Third party middleware
 
+#### [ApitallyMiddleware](https://github.com/apitally/python-client)
+
+Middleware for sending request and response metadata to [Apitally](https://apitally.io) for traffic, error and response time monitoring.
+Also provides API key authentication, with API keys and permissions managed via a simple UI in Apitally.
+
 #### [asgi-auth-github](https://github.com/simonw/asgi-auth-github)
 
 This middleware adds authentication to any ASGI application, requiring users to sign in