docs(website): Use the correct property for the description header

There is no `description` property in the Docusaurus configuration.

Signed-off-by: Martin Nonnenmacher <martin.nonnenmacher@bosch.com>

website/src/pages/index.js

@@ -55,7 +55,7 @@ export default function Home() {
   return (
     <Layout
       title={`${siteConfig.title}`}
-      description={`${siteConfig.description}`}>
+      description={`${siteConfig.tagline}`}>
       <HomepageHeader />
       <main>
         <HomepageFeatures />