errors: fix typo in internal/errors.js

Corrects "eqaul" to "equal" in the description for the
ERR_NAPI_INVALID_DATAVIEW_ARGS error message.

PR-URL: https://github.com/nodejs/node/pull/19800


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>