Upgrade to Jekyll 3.10.0

No functionality is changed. Since Ruby 3.0 dropped webrick and Ruby 3.4 is going to drop csv, this adds them back as dependencies.

https://jekyllrb.com/news/2024/06/23/jekyll-3-10-0-released/

lib/github-pages/dependencies.rb

@@ -7,7 +7,7 @@ module GitHubPages
   class Dependencies
     VERSIONS = {
       # Jekyll
-      "jekyll" => "3.9.5",
+      "jekyll" => "3.10.0",
       "jekyll-sass-converter" => "1.5.2",
       "webrick" => "1.8.1",