Fix Alex's handle

Author: anatoliykmetyuk

docs/blog/_posts/2021-03-31-scala3-rc2.md

@@ -86,6 +86,6 @@ to make sure that our regression suite includes your library.
 [@allanrenucci]: https://github.com/allanrenucci
 [@Blaisorblade]: https://github.com/Blaisorblade
 [@Duhemm]: https://github.com/Duhemm
-[@AleksanderBG]: https://github.com/AleksanderBG
+[@AleksanderBG]: https://github.com/abgruszecki
 [@milessabin]: https://github.com/milessabin
 [@anatoliykmetyuk]: https://github.com/anatoliykmetyuk