chore: Incorporate upstream changes from PR #1728 (rebase)

Co-authored-by: henryiii <4616906+henryiii@users.noreply.github.com>

Author: Copilot

.github/actions/prepare-build-site/action.yml

@@ -4,7 +4,7 @@ inputs:
   ruby-version:
     description: "Version of ruby to prepare"
     required: false
-    default: "3.3"
+    default: "3.4"
 
 runs:
   using: composite
@@ -13,9 +13,9 @@ runs:
       uses: actions/cache@v3
       with:
         path: vendor/bundle
-        key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}
+        key: ${{ runner.os }}-gems-${{ inputs.ruby-version }}-${{ hashFiles('**/Gemfile.lock') }}
         restore-keys: |
-          ${{ runner.os }}-gems-
+          ${{ runner.os }}-gems-${{ inputs.ruby-version }}-
 
     - name: Restore publication cache
       uses: actions/cache@v3

Gemfile

@@ -2,7 +2,7 @@
 
 source 'https://rubygems.org'
 
-ruby '>= 2.6.0'
+ruby '>= 3.1.0'
 
 # Hello! This is where you manage which Jekyll version is used to run.
 # When you want to use a different version, change it below, save the
@@ -12,7 +12,7 @@ ruby '>= 2.6.0'
 #
 # This will help ensure the proper Jekyll version is running.
 # Happy Jekylling!
-gem 'jekyll', '~> 4.3.0'
+gem 'jekyll'
 
 # This is needed for GitHub Flavored Markdown
 gem 'kramdown-parser-gfm'
@@ -25,20 +25,24 @@ group :development do
   gem 'rake', require: false
 
   # Verify good coding practices in Ruby files
-  gem 'rubocop', '~>1.25.0', require: false
+  gem 'rubocop', require: false
 
   # Extension for Rake files
   gem 'rubocop-rake', require: false
 end
 
 # This is the default theme for new Jekyll sites. You may change this to anything you like.
-gem 'minima', '~> 2.5'
+gem 'minima'
+
+# Removed from the stdlib
+gem 'benchmark'
+gem 'logger'
 
 # If you have any plugins, put them here!
 group :jekyll_plugins do
-  gem 'jekyll-feed', '~> 0.17'
+  gem 'jekyll-feed'
   gem 'jekyll-include-cache'
-  gem 'jekyll-indico', '~> 0.6.2'
+  gem 'jekyll-indico'
   # gem 'jekyll-indico', github: 'iris-hep/jekyll-indico', branch: 'main'
 end
 
@@ -49,10 +53,10 @@ gem 'jekyll-last-modified-at'
 gem 'tzinfo-data', platforms: %i[mingw mswin x64_mingw jruby]
 
 # Needed by Nokogiri
-gem 'pkg-config', '~> 1.4'
+gem 'pkg-config'
 
 # Performance-booster for watching directories on Windows
-gem 'wdm', '~> 0.1.0' if Gem.win_platform?
+gem 'wdm' if Gem.win_platform?
 
 # Required on Ruby 3+ (next Jekyll will fix this missing dep)
 gem 'webrick'