*: promote SAML to stable

This means we no longer refer to it as "experimental" and wont make
breaking changes.

server/handlers.go

@@ -648,7 +648,7 @@ func (s *Server) handleAuthCode(w http.ResponseWriter, r *http.Request, client s
 	reqRefresh := func() bool {
 		// Ensure the connector supports refresh tokens.
 		//
-		// Connectors like `samlExperimental` do not implement RefreshConnector.
+		// Connectors like `saml` do not implement RefreshConnector.
 		conn, ok := s.connectors[authCode.ConnectorID]
 		if !ok {
 			s.logger.Errorf("connector ID not found: %q", authCode.ConnectorID)