Fix build on case-sensitive filesystems.
--- src/notifications/MacNotificationDelegate.mm.orig	2023-02-22 17:50:45.000000000 -0600
+++ src/notifications/MacNotificationDelegate.mm	2023-03-30 11:26:05.000000000 -0500
@@ -5,7 +5,7 @@
 
 #import "notifications/MacNotificationDelegate.h"
 
-#include <QString.h>
+#include <QString>
 
 #include "ChatPage.h"