Fix userguide regarding DescribedPredicate (#978)
Fix userguide regarding DescribedPredicate (#978)

DescribedPredicate had an `apply` method that was renamed to `test` in 1.0.

This PR renames the only mention of `DescribedPredicate#apply()` in the user guide.

Signed-off-by: Thomas Much <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@snailshell.de>
TNG/ArchUnit,TNG/ArchUnit