chore: update Gemfile template with nokogiri commented out (bridgetow…

…nrb#574)

Make it easier to add nokogiri for the Inspectors API by commenting it out in the Gemfile template. This should help reduce the head scratching if they copy over an inspector without fully reading the docs.

bridgetown-core/lib/site_template/Gemfile.erb

@@ -24,6 +24,10 @@ gem "bridgetown", "~> <%= Bridgetown::VERSION %>"
 # Uncomment to add file-based dynamic routing to your project:
 # gem "bridgetown-routes", "~> <%= Bridgetown::VERSION %>", group: :bridgetown_plugins
 
+# Uncomment to use the Inspectors API to manipulate the output
+# of your HTML or XML resources:
+# gem "nokogiri", "~> 1.13"
+
 # Puma is a Rack-compatible server used by Bridgetown
 # (you can optionally limit this to the "development" group)
 gem "puma", "~> 5.6"