v0.11.1

Your logo on your status page, and word of new releases. The header can
show your own mark beside the title, one per theme, and Hora now tells
you when a newer version is out: on your status page, for your eyes only,
and once through your channels, with what it brings.

Added

• Your logo in the header. [page] logo = "logo.svg" shows your own
  mark beside the title, in place of its initial tile, on every page and
  on the monthly report. SVG, PNG, WebP or JPEG, read with the config and
  served at /logo; logo_dark adds the dark theme's version, which shows
  whenever the page is dark, chosen by the system or by ?theme=dark.
• Hear of new Hora releases. Once a day Hora asks GitHub for its latest
  release; a newer one shows on the status page to the operator (version,
  the opening of its changelog, links to the release and upgrade notes) and
  is sent once through the channels. [updates] check = false turns it
  off, notify picks the channels ([]: the banner alone). Release-watch
  messages carry the notes' opening too (message in the webhook payload).