[auto] upd README TOC

Author: Anton-Latukha

README.md

@@ -34,6 +34,7 @@ Parser, evaluator and type checker for the Nix language written in Haskell.
     - [Run the result](#run-the-result)
 - [Development status loop with amazing `ghcid`](#development-status-loop-with-amazing-ghcid)
 - [Using the HNix REPL](#using-the-hnix-repl)
+- [Nix laziness](#nix-laziness)
 - [Contributing](#contributing)
 - [Evaluating Nixpkgs with HNix](#evaluating-nixpkgs-with-hnix)