Update INSTALL.md (alshedivat#2285)

Added a step to the "Recommended Approach" telling the user to wait for
the GitHub Actions to be completed so that the gh-pages branch can be
created.

INSTALL.md

@@ -24,8 +24,9 @@ The recommended approach for using **al-folio** is to first create your own site
 1. Create a new repository using this template. For this, click on [Use this template -> Create a new repository](https://github.com/new?template_name=al-folio&template_owner=alshedivat) above the file list. If you plan to upload your site to `<your-github-username>.github.io`, note that the name of your repository :warning: **MUST BE** :warning: `<your-github-username>.github.io` or `<your-github-orgname>.github.io`, as stated in the [GitHub pages docs](https://docs.github.com/en/pages/getting-started-with-github-pages/about-github-pages#types-of-github-pages-sites).
 2. In this new repository, go to `Settings -> Actions -> General -> Workflow permissions` and give `Read and write permissions` to GitHub Actions.
 3. Open file `_config.yml`, set `url` to `https://<your-github-username>.github.io` and leave `baseurl` **empty** (do NOT delete it).
-4. Finally, in the repository page go to `Settings -> Pages -> Build and deployment`, make sure that `Source` is set to `Deploy from a branch` and set the branch to `gh-pages` (NOT to master).
-5. Wait until the GitHub actions finish (check your repository **Actions** tab), then simply navigate to `https://<your-github-username>.github.io` in your browser. At this point you should see a copy of the theme's [demo website](https://alshedivat.github.io/al-folio/).
+4. Wait until the GitHub actions finish (check your repository **Actions** tab). Now, in addition to the master branch, your repository has a newly built gh-pages branch.
+5. Finally, in the repository page go to `Settings -> Pages -> Build and deployment`, make sure that `Source` is set to `Deploy from a branch` and set the branch to `gh-pages` (NOT to master).
+6. Wait until the GitHub actions finish (check your repository **Actions** tab), then simply navigate to `https://<your-github-username>.github.io` in your browser. At this point you should see a copy of the theme's [demo website](https://alshedivat.github.io/al-folio/).
 
 After everything is set up, you can download the repository to your machine and start customizing it. To do so, run the following commands: