message: docs: fix GitHub pages deployment command
  closes
  PR Close
diff: @@ -35,7 +35,7 @@ Make a note of the user name and project name in GitHub.
  1. Build your project using Github project name, with the Angular CLI command [`ng build`](cli/build) and the options shown here:
  <code-example language="none" class="code-shell">
  - ng build --prod --output-path docs --base-href <project_name>
  + ng build --prod --output-path docs --base-href /<project_name>/
  </code-example>
  1. When the build is complete, make a copy of `docs/index.html` and name it `docs/404.html`.
  