adding Automation as a group, updating styleguide headmatter section

Author: Whatthefoxsays

src/constants/groups.js

@@ -156,6 +156,10 @@ const GROUPS = {
     name: 'Getting Started',
     order: null,
   },
+  'automation': {
+    name: 'Automation',
+    order: null,
+  },
   'ungrouped': {
     name: 'Ungrouped',
     order: null,

styleguide.md

@@ -79,6 +79,7 @@ The sections in **Bold** are the categories. The "group" field in the head matte
 #### UI
 
 **Sending Email**
+- Automation: automation
 - Building Email: building-email
 - Delivery & Optimization: delivery-optimization
 - Building Email with Marketing Campaigns: marketing-campaigns