Update Gemfile and _config.yml

Gemfile

@@ -1,4 +1,6 @@
 source 'https://rubygems.org'
 gem 'github-pages', group: :jekyll_plugins
 gem 'webrick', '~> 1.7'
-gem 'jekyll-seo-tag'
+gem 'jekyll-seo-tag'
+gem "jekyll-seo-tag"
+gem "jekyll-sitemap"

_config.yml

@@ -18,7 +18,7 @@ tagline: Course Website
 description: Reading materials and assignments for the course Introduction to Digital Humanities, taught at Princeton University in the Fall of 2024.
 author: Wouter Haverals
 baseurl: '/IntroDH-Fall2024' # the subpath of your site, e.g. /blog
-url: 'https://github.com/WHaverals' # the base hostname & protocol for your site, e.g. http://example.com
+url: url: 'https://whaverals.github.io'  # the base hostname & protocol for your site, e.g. http://example.com
 logo: 'assets/favicon/class-logo.png'
 favicon_ico: 'assets/favicon/class-logo.ico'
 exclude: ["Gemfile", "Gemfile.lock", "LICENSE"]