Add hast-util-minify-whitespace to list of utilities

Author: wooorm

readme.md

@@ -443,6 +443,8 @@ The rest is sorted alphabetically based on content after `hast-util-`
   — check if `node` is a JavaScript `script`
 * [`hast-util-labelable`](https://github.com/syntax-tree/hast-util-labelable)
   — check if `node` is labelable
+* [`hast-util-minify-whitespace`](https://github.com/rehypejs/rehype-minify/tree/main/packages/hast-util-minify-whitespace)
+  — minify whitespace between elements
 * [`hast-util-parse-selector`](https://github.com/syntax-tree/hast-util-parse-selector)
   — create an element from a simple CSS selector
 * [`hast-util-phrasing`](https://github.com/syntax-tree/hast-util-phrasing)