Use hyphens instead of en dashes for unordered lists

[Gelio]

Unordered lists in the English version of the book were marked with en dashes (–), instead of hyphens (-). Those do not produce real unordered lists but are treaded in Markdown as a single paragraph.

The conversion was done using the following command:

rg '^–' -g '*.md' --files-with-matches | xargs sed -i 's/^–/-/g'

which uses https://github.com/BurntSushi/ripgrep

The problem occurred only in the English version of the book. Other languages already used hyphens. I assume this may be because the app @michaelnozbe is using to write the original version of the book may automatically convert en dashes to hyphens 🙂 It would probably be nice to add a GitHub Action or some other commit check that would verify that rg '^–' -g '*.md' --files-with-matches returns no results 😄

Pages affected

You can find – on these pages to see the incorrectly rendered lists:

1. https://nooffice.org/customers/
2. https://nooffice.org/decide/
3. https://nooffice.org/friday/
4. https://nooffice.org/lean/
5. https://nooffice.org/pay/
6. https://nooffice.org/reunion/
7. https://nooffice.org/vlog/
8. https://nooffice.org/week/

Example fix

https://nooffice.org/lean/

Before (original):

After: