Update README for "docker-compose" to "docker compose"

[TDHster]

Checklist

• I've generated a new bot from the bot-template and checked that everything works:
  • Linters and tests have passed
  • Bot answers on /help command
  • Bot suggests available commands
• I've written good commit message for all commits
• I've split changes into separate commits where it's appropriate
• I'll make a release when PR is approved