One of the most common problems GitHub Pages users run into is not seeing changes that they've made to their site. After you push a new commit to your repository, it can take up to 10 minutes for the GitHub Pages build process to complete and for your changes to appear.
If it's been over 10 minutes and your changes still haven't appeared, your browser may be serving a cached version of the page. To fix this, you can reset your browser's cache or visit your site in an incognito or private browsing window.
For help with other Pages errors, please see
Troubleshooting GitHub Pages builds.