fix grammar issues in functions generating functions concept

[tasxatzial]

No description provided.

[github-actions]

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[michalporeba]

@BNAndras, why did you merge the commit with an outstanding review question without commenting on it?

[BNAndras]

My apologies! I didn’t mean to cause any offense.

The repo is marked as maintained-solitary on Exercism (https://exercism.org/maintaining/track_categories) so a cross-track-maintainer would be expected to be involved in a review. This PR was pretty straightforward so I didn’t think it’d be an issue to wave it in. Since you’re a maintainer, I’ll be more hands-off next time unless I get a ping.

[michalporeba]

Thanks, @BNAndras, I think the grammar fix introduced another grammar issue, but we'll get it resolved with another PR.