Update to 1.47.6

• Update to debhelper v11.
• Move repository to salsa.debian.org.
• Update Vcs-Git/Vcs-Browser.
• Update standards version to 4.1.3:
  • update config.{guess,sub} at build time
• Add Brazilian Portuguese translation of info page (thanks to Rafael Fontenelle).
• Update Hungarian translation (thanks to Balázs Úr)
• Update Brazilian Portuguese translation (thanks to Rafael Fontenelle).