The conversion script for help-beta assumes that all items in a numbered
list start with 1. which was a wrong assumption. This commit attempts to
fix that. We are not introducing any lint step to tackle this since it
will be easy to just check for this again before the cutover happens.
We do not change this for `numbered-list-examples.md` since that example
shows how the current numbered lists work and we might still want to
show that. We can decide what to do with that file once the time of
cutover arrives.
This is a followup commit to #30824.
Fixes
https://chat.zulip.org/#narrow/stream/9-issues/topic/.F0.9F.8E.AF.20help.20not.20updated.20for.20new.20preferences.20sections/near/1899330.
git grep in the help directory will still show up results for `Advanced`
but those are mostly used in either plain english language instructions
or refer to some other part of the app. At the point of writing this
commit, there were 6 results for `Advanced`, 4 of which were plain
english, 1 refers to the Advanced settings in chrome for desktop
notifications, and another one refers to `Advanced configurations` for
channel settings.
