assert: switch `inputs` to `values`

The wording seems clearer when using `values` instead of `inputs`.

PR-URL: https://github.com/nodejs/node/pull/23056
Refs: https://github.com/nodejs/node/issues/22763


Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>