Ready blog section for vanilla Docsy

Align the (currently unused) menu entry for the blog section so it's got
the front matter data that plain Docsy would use.

Author: Tim Bannister

content/en/blog/_index.md

@@ -4,9 +4,7 @@ linkTitle: Blog
 menu:
   main:
     title: "Blog"
-    weight: 40
-    post: >
-       <p>Read the latest news for Kubernetes and the containers space in general, and get technical how-tos hot off the presses.</p>
+    weight: 20
 ---
 {{< comment >}}