Update README

Author: igor-ramazanov

README.md

@@ -105,7 +105,7 @@ This repo uses `nix` based GitHub actions for caching the development environmen
 instead of the traditional approach with [`coursier/setup-action`](https://github.com/coursier/setup-action) and [`coursier/cache-action`](https://github.com/coursier/cache-action):
 1. https://github.com/DeterminateSystems/nix-installer-action
 1. https://github.com/DeterminateSystems/flake-checker-action
-1. https://github.com/DeterminateSystems/magic-nix-cache-action
+1. https://github.com/DeterminateSystems/flakehub-cache-action
 
 
 ## Debugging