net/tlrc: update to 1.9.0

- Client specification v2.2
- Fixed rendering of triple brace placeholders ({{{ ... }}} no longer shows
  one brace outside)
- On --update, the new sha256sums will be compared to the old ones and archives
  that haven't been updated won't be downloaded anymore
- Improved shell completions (#50)
- New config option: cache.mirror
- The default mirror has been changed from https://raw.githubusercontent.com/tldr-pages/tldr-pages.github.io/main/assets
  to https://github.com/tldr-pages/tldr/releases/latest/download as per the new
  client specification

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