Update pubnub/request_handlers/httpx.py

Co-authored-by: Mateusz Wiktor <39187473+techwritermat@users.noreply.github.com>

Author: Sebastian Molenda

pubnub/request_handlers/httpx.py

@@ -24,7 +24,7 @@
 
 
 class HttpxRequestHandler(BaseRequestHandler):
-    """ PubNub Python SDK Native requests handler based on `requests` HTTP library. """
+    """ PubNub Python SDK synchronous requests handler based on `httpx` HTTP library. """
     ENDPOINT_THREAD_COUNTER: int = 0
 
     def __init__(self, pubnub):