Improve the doc more

Author: afarber

documentation/jetty/modules/programming-guide/pages/server/http.adoc

@@ -537,7 +537,7 @@ The HTTP/3 client may now initiate a QUIC connection on port `843` and make HTTP
 
 NOTE: It is nowadays common to use the same port `443` for both HTTP/2 and HTTP/3. This does not cause problems because HTTP/2 listens on the TCP port `443`, while QUIC listens on the UDP port `443`.
 
-TIP: When using `HTTP3ServerConnectionFactory`, the `Alt-Svc` header is automatically added to HTTP/2 responses, advertising the HTTP/3 connector's port.
+TIP: The `Alt-Svc` header is automatically added to HTTP/2 responses, advertising the HTTP/3 connector's port.
 
 It is therefore common for HTTP/3 clients to initiate connections using the HTTP/2 protocol over TCP, and if the server supports HTTP/3 switch to HTTP/3 as indicated by the server.