Update docs for change in upstream dependencies

Closes GH-23.

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

Author: Trott

readme.md

@@ -76,7 +76,7 @@ This package exports the following identifier: `fromMarkdown`.
 There is no default export.
 
 The export map supports the endorsed
-[`development` condition](https://nodejs.org/api/packages.html#packages_resolving_user_conditions).
+[`development` condition](https://nodejs.org/api/packages.html#packages\_resolving\_user\_conditions).
 Run `node --conditions development module.js` to get instrumented dev code.
 Without this condition, production code is loaded.