Error in collection documentation

[philiplb]

This example on https://philiplb.github.io/Valdi/docs/html/1.0.0/manual/validators.html#collection:

$rules = $builder
    ->field('a', $validator, $itemRules)
    ->build()
;

Should be

$rules = $builder
    ->field('a', 'collection', $validator, $itemRules)
    ->build()
;