message: feat(docs-infra): add meta[name]=Description to angular.io's index.html
  This change makes angular.io more user and SEO friendly according to web.dev.
  See:
  PR Close
diff: <head>
  <meta charset="utf-8">
  <title>Angular</title>
  + <meta name="Description" content="Angular is a platform for building mobile and desktop web applications.
  + Join the community of millions of developers who build compeling user interfaces with Angular.">
  <base href="/">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  