Added missing description to layouts

Corrected meta key name

Author: adamzerella

src/layout/component/page.js

@@ -52,6 +52,7 @@ const ComponentPage = ({
 <meta name="msapplication-TileColor" content="#ffffff">
 <meta name="theme-color" content="#ffffff">
 <meta name="robots" content="index, follow">
+<meta name="description" content="${ module !== '' ? `${ MODULE.description } - ` : '' }Australian Government Design System">
 <meta name="author" content="Digital Transformation Agency">
 <meta name="twitter:card" content="summary_large_image">
 <meta name="twitter:title" content="Australian Government Design System">

src/layout/home/page.js

@@ -30,6 +30,7 @@ const Page = ({
 <meta name="theme-color" content="#ffffff">
 <meta name="robots" content="index, follow">
 <meta name="author" content="Digital Transformation Agency">
+<meta name="description" content="The Australian Government Design System provides a framework and a set of tools to help designers and developers build government products and services more easily.">
 <meta name="twitter:card" content="summary_large_image">
 <meta name="twitter:title" content="Australian Government Design System">
 <meta name="twitter:description" content="Inclusive design, open-source code and shared insights">