style(requirements): fixup heirarchy

Author: slack

src/installing-deis/system-requirements.md

@@ -16,11 +16,11 @@ Running smaller machines will likely result in increased system load and has bee
 
 # Kubernetes Requirements
 
-### Versions
+## Versions
 
 Deis workflow has been tested with the Kubernetes v1.1 release line. While Kubernetes 1.2 may work we haven't fully tested that release.
 
-### Daemon Sets
+## Daemon Sets
 
 The logging components require Kubernetes Daemon Sets API. DaemonSets are not enabled by default in the v1.1 release line, to enable these extensions follow the instructions found [here](http://kubernetes.io/v1.1/docs/api.html#enabling-resources-in-the-extensions-group). If you are running Kubernetes v1.2, DaemonSets are enabled by default.
 
@@ -35,6 +35,8 @@ v1
 $
 ```
 
+# Docker Requirements
+
 ## Docker Version
 
 Any Kubernetes 1.1 cluster should also use a Docker version < 1.10.0 so that `kubectl exec` and Deis database health checks work properly (Refs: [fsouza/go-dockerclient#455](https://github.com/fsouza/go-dockerclient/issues/455) and [kubernetes/kubernetes#19720](https://github.com/kubernetes/kubernetes/issues/19720)).