test: switch arguments of assert()

The arguments of the assert were passed in the wrong order
(expected, actual). This would have been confusing in case
of an error. Changed it to be (actual, expected)

PR-URL: https://github.com/nodejs/node/pull/23524


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>