UI: Use obsproject.com URL for discord invite

UI/window-basic-main.cpp

@@ -5253,7 +5253,7 @@ void OBSBasic::on_actionWebsite_triggered()
 
 void OBSBasic::on_actionDiscord_triggered()
 {
-	QUrl url = QUrl("https://discord.gg/obsproject", QUrl::TolerantMode);
+	QUrl url = QUrl("https://obsproject.com/discord", QUrl::TolerantMode);
 	QDesktopServices::openUrl(url);
 }