Add webrick for Ruby 3

Author: rossabaker

Gemfile

@@ -1,3 +1,5 @@
 source "http://rubygems.org"
 
 gem "github-pages", group: :jekyll_plugins
+
+gem "webrick", "~> 1.7"

Gemfile.lock

@@ -251,13 +251,15 @@ GEM
       unf_ext
     unf_ext (0.0.8.2)
     unicode-display_width (1.8.0)
+    webrick (1.7.0)
     zeitwerk (2.6.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   github-pages
+  webrick (~> 1.7)
 
 BUNDLED WITH
    2.3.9

gemset.nix

@@ -961,6 +961,16 @@
     };
     version = "1.8.0";
   };
+  webrick = {
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["http://rubygems.org"];
+      sha256 = "1d4cvgmxhfczxiq5fr534lmizkhigd15bsx5719r5ds7k7ivisc7";
+      type = "gem";
+    };
+    version = "1.7.0";
+  };
   zeitwerk = {
     groups = ["default" "jekyll_plugins"];
     platforms = [];