Update creating-a-github-pages-site-with-jekyll.md

The `jekyll new --skip-bundle .` step should happen in the root directory. The previous step said to `cd docs` but seems that's not necessary? But if you're still in the docs directory (from the previous step), you'll create the site in the wrong place.

Alternatively, remove the `cd docs` command if it's really not needed.

content/pages/setting-up-a-github-pages-site-with-jekyll/creating-a-github-pages-site-with-jekyll.md

@@ -82,7 +82,7 @@ Before you can use Jekyll to create a {% data variables.product.prodname_pages %
     # Removes the contents from your default branch from the working directory
     ```
 
-1. To create a new Jekyll site, use the `jekyll new` command:
+1. To create a new Jekyll site, use the `jekyll new` command in your repository's root directory:
 
    ```shell
    $ jekyll new --skip-bundle .