Revert ".devcontainer: nixfmt-rfc-style -> nixfmt"

Changed files
+1 -1
.devcontainer
+1 -1
.devcontainer/devcontainer.json
···
"ghcr.io/devcontainers/features/nix:1": {
// fails in the devcontainer sandbox, enable sandbox via config instead
"multiUser": false,
-
"packages": "nixpkgs.nixd,nixpkgs.nixfmt",
+
"packages": "nixpkgs.nixd,nixpkgs.nixfmt-rfc-style",
"useAttributePath": true,
"extraNixConfig": "experimental-features = nix-command flakes,sandbox = true"
}