Refactor some docs

Author: wooorm

readme.md

@@ -81,7 +81,7 @@ you need.
 ## Install
 
 This package is [ESM only][esm].
-In Node.js (version 12.20+, 14.14+, 16.0+, 18.0+), install with [npm][]:
+In Node.js (version 12.20+, 14.14+, or 16.0+), install with [npm][]:
 
 ```sh
 npm install unified
@@ -1289,7 +1289,7 @@ export function rehypeStringify(options) {}
 
 Projects maintained by the unified collective are compatible with all maintained
 versions of Node.js.
-As of now, that is Node.js 12.20+, 14.14+, 16.0+, and 18.0+.
+As of now, that is Node.js 12.20+, 14.14+, and 16.0+.
 Our projects sometimes work with older versions, but this is not guaranteed.
 
 ## Contribute