tools: fix broken link hash

This typo results in a non-functional link in the WebCrypto docs. This
change fixes it.

PR-URL: https://github.com/nodejs/node/pull/39426


Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>