Use upstream gomod2nix again

The recursive symlinker fix has been merged.

Fix symlink builder to recursively walk the vendor directory by niklashhh
· Pull Request #121 · nix-community/gomod2nix
nix-community/gomod2nix#121

flake.nix

@@ -11,7 +11,7 @@
     crane.url = "github:ipetkov/crane";
     crane.inputs.nixpkgs.follows = "nixpkgs";
 
-    gomod2nix.url = "github:fore-stun/gomod2nix/fix-recursive-symlinker";
+    gomod2nix.url = "github:nix-community/gomod2nix";
     gomod2nix.inputs.nixpkgs.follows = "nixpkgs";
     gomod2nix.inputs.flake-utils.follows = "flake-utils";
   };