doc: fix lint re-enabling comment in README.md

If there is not a blank line before it, the comment does not re-enable
the rule.

PR-URL: https://github.com/nodejs/node/pull/40647
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>

README.md

@@ -625,6 +625,7 @@ For information about the governance of the Node.js project, see
   **Yorkie Liu** <<yorkiefixer@gmail.com>>
 
 </details>
+
 <!--lint enable prohibited-strings-->
 
 Collaborators follow the [Collaborator Guide](./doc/guides/collaborator-guide.md) in