Rename "note" function

[NelosG]

Description

Problem: note function has too general name. It's not clear from its name what it does. Solution: Renamed note function to validateJust.

Related issues(s)

• Fixed #176 by renaming note function to validateJust.

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[dcastro]

Hi @NelosG! Thank you for your contribution and apologies for the late reply.

After some debate, the team has decided to delete the note function (see https://github.com/serokell/universum/issues/176#issuecomment-1084592389), so I'm closing this PR.

[gromakovsky]

@NelosG feel free to make the change that removes note and re-open this PR (updating it accordingly) or open a new one.