message: fix(docs-infra): add `updating-content-github-ui` guide to the sidenav
  It seems that the `updating-content-github-ui` guide was accidentally
  omitted from the sidenav in
  This commit adds the guide to the sidenav.
  PR Close
diff: {
  "url": "guide/contributors-guide-overview",
  "title": "Overview",
  - "tooltip": "Provides an overview of how to contribute to Angular's documentation"
  + "tooltip": "Provides an overview of how to contribute to Angular's documentation."
  },
  {
  "url": "guide/reviewing-content",
  "title": "Updating search keywords",
  "tooltip": "Help users find the content they need by adding additional search keywords."
  },
  + {
  + "url": "guide/updating-content-github-ui",
  + "title": "Updating content using GitHub UI",
  + "tooltip": "Update topics in the browser through the GitHub user interface."
  + },
  {
  "url": "guide/docs-style-guide",
  "title": "Documentation Style Guide",
  