Changelog

• Make the theme responsive (#46)
  Contributed by Olga Bulat.
• Use Python 3.8 for the Github Actions (#71)
  Contributed by Stéphane Wirtel.
• Use default pygments theme (#68)
  Contributed by Aaron Carlisle.
• Test Github action to validate the theme against docsbuild scripts. (#69)
  Contributed by Julien Palard.
• Add the copy button to pycon3 highlighted code blocks. (#64)
  Contributed by Julien Palard.

Thank you to all the contributors and reviewers 🎉