fix formatting issue

flake.nix

@@ -1,18 +1,18 @@
 {
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
-	utils.url = "github:numtide/flake-utils";
+    utils.url = "github:numtide/flake-utils";
   };
 
   outputs = { self, nixpkgs, utils }:
     utils.lib.eachDefaultSystem (system:
-	  let
-	    pkgs = import nixpkgs { inherit system; };
-	  in
-	  {
-	    devShell = with pkgs; mkShell {
-		  buildInputs = [ typst gnumake jq xdg-utils zip ];
-		};
-	  }
-	);
+      let
+        pkgs = import nixpkgs { inherit system; };
+      in
+      {
+        devShell = with pkgs; mkShell {
+          buildInputs = [ typst gnumake jq xdg-utils zip ];
+        };
+      }
+    );
 }