Add missing localizable string

UI/Scheduler/English.lproj/Localizable.strings

@@ -533,3 +533,4 @@ vtodo_class2 = "(Confidential task)";
 "Web Calendar" = "Web Calendar";
 "Reload on login" = "Reload on login";
 "Invalid number." = "Invalid number.";
+"Please identify yourself to %{0}" = "Please identify yourself to %{0}";

UI/WebServerResources/SchedulerUI.js

@@ -1441,7 +1441,7 @@ function reauthenticateWebCalendar(folderID, refreshCBData) {
         triggerAjaxRequest(url, authenticateWebCalendarCallback, refreshCBData, parameters,
                            { "Content-type": "application/x-www-form-urlencoded" });
     }
-    showAuthenticationDialog(_("Please identify yourself to \"%{0}\"...")
+    showAuthenticationDialog(_("Please identify yourself to %{0}")
                              .formatted(hostname),
                              authenticate);
 }