Fix typo

Closes GH-8.

Reviewed-by: Christian Murphy <[email protected]>
Reviewed-by: Titus Wormer <[email protected]>

Author: mattleff

readme.md

@@ -38,7 +38,7 @@ This package is [ESM only][esm].
 In Node.js (version 12.20+, 14.14+, 16.0+, 18.0+), install with [npm][]:
 
 ```sh
-npm install nlcst-util-to-string
+npm install nlcst-to-string
 ```
 
 In Deno with [`esm.sh`][esmsh]: