Fix order of titles so they actually make sense

README.md

@@ -2,13 +2,13 @@
 [These are not the runbooks you are looking for](https://gitlab.com/gitlab-com/runbooks)
-## Where and how to look for data
-
-### Design decisions
+## Design decisions
 * [Storage design](design/storage.md)
 * [Network design](design/networking.md)
+## Where and how to look for data
+
 ### General System Health
 #### Blackbox Monitoring