Update SUMMARY.md
move the FAQ section to the bottom, after Plugins finish.
[Architecture](./architecture.md)
-[FAQ](./faq.md)
-
---
- [Tutorial: Building CronJob](cronjob-tutorial/cronjob-tutorial.md)
---
+[FAQ](./faq.md)
+
[Appendix: The TODO Landing Page](./TODO.md)
[plugins]: ./plugins/plugins.md
