🐛 Fix: Update Jekyll and add webrick gem for Windows compatibility

- Bumped Jekyll from 3.9.0 to 3.9.3 to address issues related to running
  Jekyll on Windows.

- Added the "webrick" gem (version "~> 1.7") to the Gemfile to resolve a
  dependency issue that was preventing Jekyll from running correctly on
  Windows.

Gemfile

@@ -1,41 +1,45 @@
-source "https://rubygems.org"
-
-ruby RUBY_VERSION
-
-# 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
-# file and run `bundle install`. Run Jekyll with `bundle exec`, like so:
-#
-#     bundle exec jekyll serve
-#
-# This will help ensure the proper Jekyll version is running.
-# Happy Jekylling!
-gem "jekyll", "~> 3.9.0"
-
-# If you want to use GitHub Pages, remove the "gem "jekyll"" above and
-# uncomment the line below. To upgrade, run `bundle update github-pages`.
-# gem "github-pages", group: :jekyll_plugins
-# If you have any plugins, put them here!
-group :jekyll_plugins do
-  gem 'github-pages'
-  #gem 'jekyll-feed'
-  #gem 'jekyll-sitemap'
-  #gem 'jekyll-seo-tag'
-  #gem 'jekyll-gist'
-  #gem 'jekyll-loading-lazy'
-  #gem 'jekyll-webp'
-  #gem 'jekyll-gzip'
-  #gem 'jekyll-extlinks'
-  #gem 'jekyll-remote-theme'
-  #gem 'jekyll-github-metadata'    
-end
-
-# Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem
-# and associated library.
-platforms :mingw, :x64_mingw, :mswin, :jruby do
-  gem "tzinfo", "~> 1.2"
-  gem "tzinfo-data"
-end
-
-# Performance-booster for watching directories on Windows
-gem "wdm", "~> 0.1.1", :platforms => [:mingw, :x64_mingw, :mswin]
+source "https://rubygems.org"
+
+ruby RUBY_VERSION
+
+# 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
+# file and run `bundle install`. Run Jekyll with `bundle exec`, like so:
+#
+#     bundle exec jekyll serve
+#
+# This will help ensure the proper Jekyll version is running.
+# Happy Jekylling!
+gem "jekyll", "~> 3.9.3"
+
+# If you want to use GitHub Pages, remove the "gem "jekyll"" above and
+# uncomment the line below. To upgrade, run `bundle update github-pages`.
+# gem "github-pages", group: :jekyll_plugins
+# If you have any plugins, put them here!
+group :jekyll_plugins do
+  gem 'github-pages'
+  #gem 'jekyll-feed'
+  #gem 'jekyll-sitemap'
+  #gem 'jekyll-seo-tag'
+  #gem 'jekyll-gist'
+  #gem 'jekyll-loading-lazy'
+  #gem 'jekyll-webp'
+  #gem 'jekyll-gzip'
+  #gem 'jekyll-extlinks'
+  #gem 'jekyll-remote-theme'
+  #gem 'jekyll-github-metadata'    
+end
+
+# Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem
+# and associated library.
+platforms :mingw, :x64_mingw, :mswin, :jruby do
+  gem "tzinfo", "~> 1.2"
+  gem "tzinfo-data"
+end
+
+# Performance-booster for watching directories on Windows
+gem "wdm", "~> 0.1.1", :platforms => [:mingw, :x64_mingw, :mswin]
+
+# Fix for Load error: cannot load such file – webrick 
+# (https://talk.jekyllrb.com/t/load-error-cannot-load-such-file-webrick/5417)
+gem "webrick", "~> 1.7"