fix: use devShells.default on template flake (#282)

Author: WolfangAukang

templates/toml/flake.nix

@@ -11,7 +11,7 @@
 
   outputs = { self, flake-utils, devshell, nixpkgs, ... }:
     flake-utils.lib.eachDefaultSystem (system: {
-      devShell =
+      devShells.default =
         let
           pkgs = import nixpkgs {
             inherit system;

templates/toml/shell.nix

@@ -8,8 +8,9 @@ then
       else "path";
   in
     (builtins.getFlake "${scheme}://${toString ./.}")
-    .devShell
+    .devShells
     .${builtins.currentSystem}
+    .default
 
 # Otherwise we'll use the flake-compat shim
 else