Addresses #6332.
This allows
```
1. [ ] task1
2. [ ] task2
```
to be rendered with numbers.
It also fixes a little alignment issue between items from unordered checkbox and other lists.
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/9184
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
Reviewed-by: Ellen Εμιλία Άννα Zscheile <fogti@noreply.codeberg.org>
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Reviewed-by: 0ko <0ko@noreply.codeberg.org>
Co-authored-by: Robert Wolff <mahlzahn@posteo.de>
Co-committed-by: Robert Wolff <mahlzahn@posteo.de>
c6a2b7e0a6