Update devshell outputs to `devShells.default`

devshell/flake.nix

@@ -6,7 +6,7 @@
   };
   outputs = { self, nixpkgs, utils, devshell }:
     utils.lib.eachDefaultSystem (system: {
-      devShell = let
+      devShells.default = let
         pkgs = import nixpkgs {
           inherit system;
 

go/flake.nix

@@ -28,7 +28,7 @@
 
         apps.default = utils.lib.mkApp { drv = packages.default; };
 
-        devShell =
+        devShells.default =
           pkgs.devshell.mkShell { packages = with pkgs; [ go gopls ]; };
       });
 }

rust/flake.nix

@@ -30,7 +30,7 @@
         apps.default = utils.lib.mkApp { drv = packages.default; };
 
         # Provide a dev env with rust and rls
-        devShell = let
+        devShells.default = let
           pkgs = import nixpkgs {
             inherit system;
             overlays = [ devshell.overlay ];