readme: update acknowledgements for CS2

Author: markus-wa

README.md

@@ -326,7 +326,8 @@ To install some (optional, but quite handy) `pre-commit` and `pre-push` hooks, y
 
 This library was originally based on <a href="https://github.com/ValveSoftware/csgo-demoinfo" rel="external">Valve's demoinfogo</a> and <a href="https://github.com/StatsHelix/demoinfo" rel="external">SatsHelix's demoinfo</a> (although today it shares little resemblence with these two).
 
-Thanks to [@JetBrains](https://github.com/JetBrains) for sponsoring a license of their awesome [GoLand](https://www.jetbrains.com/go/) IDE for this project - go check it out!
+For Counter-Strike 2, [dotabuff/manta](https://github.com/dotabuff/manta) was an amazing resource for how to parse Source 2 demos and CS2 support would not have been possible without it.<br>
+I would also like to specifically thank @akiver & LaihoE for their brilliant help with CS2.
 
 And a very special thanks goes out to all the [⭐contributors⭐](https://github.com/markus-wa/demoinfocs-golang/graphs/contributors)️, be it in the form of PRs, issues or anything else.