ClickHouse documentation writing guide is outdated

[DamianMaslanka5]

https://github.com/ClickHouse/clickhouse-docs/blob/main/contribute/contrib-writing-guide.md?plain=1#L76

yarn prep-from-master doesn't work

error Command "prep-from-master" not found.

There are also other occurrences of prep-from-master

[gingerwizard]

https://github.com/ClickHouse/clickhouse-docs/pull/3664/files