[docgen] Update docs

skip-checks: true

Author: Github Actions

README.md

@@ -315,7 +315,7 @@ You can view this list in vim with `:help conform-formatters`
 - [nginxfmt](https://github.com/slomkowski/nginx-config-formatter) - nginx config file formatter/beautifier written in Python with no additional dependencies.
 - [nickel](https://nickel-lang.org/) - Code formatter for the Nickel programming language.
 - [nimpretty](https://github.com/nim-lang/nim) - nimpretty is a Nim source code beautifier that follows the official style guide.
-- [nixfmt](https://github.com/NixOS/nixfmt) - The official (but not yet stable) formatter for Nix code.
+- [nixfmt](https://github.com/NixOS/nixfmt) - The official formatter for Nix code.
 - [nixpkgs_fmt](https://github.com/nix-community/nixpkgs-fmt) - nixpkgs-fmt is a Nix code formatter for nixpkgs.
 - [nomad_fmt](https://developer.hashicorp.com/nomad/docs/commands/fmt) - The fmt commands check the syntax and rewrites Nomad configuration and jobspec files to canonical format.
 - [nph](https://github.com/arnetheduck/nph) - An opinionated code formatter for Nim.

doc/conform.txt

@@ -448,7 +448,7 @@ FORMATTERS                                                    *conform-formatter
 `nickel` - Code formatter for the Nickel programming language.
 `nimpretty` - nimpretty is a Nim source code beautifier that follows the
             official style guide.
-`nixfmt` - The official (but not yet stable) formatter for Nix code.
+`nixfmt` - The official formatter for Nix code.
 `nixpkgs_fmt` - nixpkgs-fmt is a Nix code formatter for nixpkgs.
 `nomad_fmt` - The fmt commands check the syntax and rewrites Nomad configuration
             and jobspec files to canonical format.