web: leave tabular figures to tabular-nums so hyphens keep their width #1

fixes TAN-1061 (tangled issue 4637, hyphen glyph has too much padding).

the sans font had tnum enabled globally, which gives every glyph a tabular width, including the hyphen. that is why dwn/better-ci-rust and commit-lint.yml show gaps around the hyphens.

• drop "tnum" 1 from the global sans font feature settings
• add tabular-nums where aligned digits matter: TimeAgo, the pipeline eta and the pipeline outcome

branches page, before and after:

pnpm test, eslint, pnpm check and prettier clean on changed files.