Refactor App:startSyncReminderPolling for clarity

- Updated the `App:startSyncReminderPolling` function to improve code readability by restructuring the return statement. This change enhances the clarity of the function's flow without altering its functionality.

These changes aim to maintain code quality and improve maintainability.

plugin/src/App/init.lua

@@ -544,7 +544,9 @@ end
 function App:startSyncReminderPolling()
 	-- Feature disabled: polling GET /api/rojo every 30s is expensive and
 	-- the setting was hidden behind showNotifications anyway.
-	do return end
+	do
+		return
+	end
 
 	if
 		self.syncReminderPollingThread ~= nil