Change attribution for the Haskell Beginners 2022 course

Hi!

Thanks for adding my course to the GHCup starting page 🤗

I've noticed that it's currently written on the website that the course is made by Kowainik. I made this course completely on my own and I'm no longer a member of Kowainik. So I would like to change the attribution of the course to my name.

Thanks!

docs/steps.md

@@ -335,7 +335,7 @@ see the [Cabal user guide](https://cabal.readthedocs.io/en/stable/getting-starte
 
 To learn Haskell, try any of those:
 
-- A beginner friendly [4-lectures course](https://github.com/haskell-beginners-2022/course-plan) with exercises (by [Kowainik](https://kowainik.github.io/))
+- A beginner friendly [4-lectures course](https://github.com/haskell-beginners-2022/course-plan) with exercises (by [Dmitrii Kovanikov](https://kodimensional.dev/))
 - An in-depth university [CIS 194 Haskell course](https://www.cis.upenn.edu/~cis194/spring13/) including exercises (by [Brent Yorgey](https://byorgey.wordpress.com/))
 
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