Add new maintainers (#102)

Signed-off-by: Stanislav (Stanley) Modrak <44023416+smith558@users.noreply.github.com>

Author: smith558

README.md

@@ -1,7 +1,7 @@
 [![Website shields.io](https://img.shields.io/website-up-down-green-red/http/shields.io.svg)](https://learnyouahaskell.github.io/)
 [![pages-build-deployment](https://github.com/learnyouahaskell/learnyouahaskell.github.io/actions/workflows/pages/pages-build-deployment/badge.svg?branch=main)](https://github.com/learnyouahaskell/learnyouahaskell.github.io/actions/workflows/pages/pages-build-deployment)
 
-**maintainers:** [Stanislav Modrak](https://github.com/smith558), to become a maintainer email via [here](https://stanislav.gq/) 🙂
+**maintainers:** [Stanislav Modrak](https://github.com/smith558), [Artem Pelenitsyn](https://github.com/ulysses4ever), [Pier-Luc Caron St-Pierre](https://github.com/pierluc-codes); to become a maintainer email via [here](https://stanislav.gq/) 🙂
 
 # Learn You a Haskell: A community version