neovim: fix -configured evaluation

pkgs/applications/editors/neovim/default.nix

···
   };
 
 in if (vimAlias == false && configure == null) then neovim else stdenv.mkDerivation {
-  name = "neovim-${version}-configured";
+  name = "neovim-${neovim.version}-configured";
   inherit (neovim) version;
 
   nativeBuildInputs = [ makeWrapper ];