docs/replication: change unauthorized example to 401

Author: alxndrsn

src/docs/src/replication/protocol.rst

@@ -280,7 +280,7 @@ and well handled:
 
     .. code-block:: http
 
-        HTTP/1.1 500 Internal Server Error
+        HTTP/1.1 401 Unauthorized
         Cache-Control: must-revalidate
         Content-Length: 108
         Content-Type: application/json