chore: switch devShell from go_1_24 to default go

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1770115704,
-        "narHash": "sha256-KHFT9UWOF2yRPlAnSXQJh6uVcgNcWlFqqiAZ7OVlHNc=",
+        "lastModified": 1770197578,
+        "narHash": "sha256-AYqlWrX09+HvGs8zM6ebZ1pwUqjkfpnv8mewYwAo+iM=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "e6eae2ee2110f3d31110d5c222cd395303343b08",
+        "rev": "00c21e4c93d963c50d4c0c89bfa84ed6e0694df2",
         "type": "github"
       },
       "original": {

flake.nix

@@ -50,7 +50,7 @@
         {
           default = pkgs.mkShell {
             buildInputs = with pkgs; [
-              go_1_24
+              go
               gopls
               gotools
               go-tools