[taffybar] Bump version

dotfiles/config/taffybar/shell.nix

@@ -1,7 +1,5 @@
 let
   pkgs = (import ./base.nix);
 in pkgs.haskellPackages.shellFor {
-  packages = _: [
-    pkgs.haskellPackages.imalison-taffybar pkgs.haskellPackages.taffybar
-  ];
+  packages = p: [ p.imalison-taffybar p.taffybar ];
 }