`3.0.0.pre.rc0` and `heroku-stack-20` not working

[alessandrostein]

Hi friends,

Just feedback around heroku-stack-20 and 'wkhtmltopdf-heroku', '3.0.0.pre.rc0'. They are not compatible.

# Herok
Heroku stack: 20

# Gemfile
gem 'wkhtmltopdf-heroku', '3.0.0.pre.rc0' 

Raised this exception

RuntimeError: Failed to execute: ["/app/vendor/bundle/ruby/3.2.0/gems/wkhtmltopdf-heroku-3.0.0.pre.rc0/bin/wkhtmltopdf-linux-amd64", "--page-size", "Letter", "--margin-top", "13", "--margin-bottom", "3...