Add required gems removed from default gemset

Gemfile

@@ -4,6 +4,8 @@ ruby RUBY_VERSION
 # This will help ensure the proper Jekyll version is running.
 gem "jekyll", "~> 4.2"
 
+gem "csv"
+gem "base64"
+
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
-