[Tolk] Put articles in agreement with styleguide

[verytactical]

AI review fails a lot of checks on migrated Tolk articles.

Fix articles.

[reveloper]

@novusnota @verytactical
I propose performing this at least after the update to Tolk v1.2 #1127.
Moreover, if we decide to wait for the release of the reference documentation, this job may ultimately be a waste of time. (this idea hasn't been discussed in detail yet)

[anton-trunov]

@reveloper I'm fine both ways, as long as the new Tolk content passes the AI-review.