chore(nix): use the same ghc version in nix and cabal.project

Author: andreabedini

cabal.project

@@ -1,6 +1,6 @@
 packages: .
 index-state: 2023-09-10T21:31:08Z
-with-compiler: ghc-9.4.7
+with-compiler: ghc-9.4.8
 
 tests: True
 test-show-details: direct

flake.nix

@@ -28,7 +28,7 @@
 
         project = pkgs.haskell-nix.cabalProject' {
           src = ./.;
-          compiler-nix-name = "ghc94";
+          compiler-nix-name = "ghc948";
           shell.tools = {
             cabal = "latest";
             hlint = "latest";