Remove "domain" param from list directories query

[mattgd]

Description

We no longer support querying directories by domain, so removing the option from the method doc.

Documentation

Does this require changes to the WorkOS Docs? E.g. the API Reference or code snippets need updates.

[ ] Yes

If yes, link a related docs PR and add a docs maintainer as a reviewer. Their approval is required.

[linear[bot]]

DSYNC-1246 Remove domain param from workos-php

[nicknisi]

@mattgd do you know if this can be closed or if it should still be merged? Thanks!

[mattgd]

@mattgd do you know if this can be closed or if it should still be merged? Thanks!

This still needs to be merged, but since it's a breaking change I was waiting for a major version bump.