[Docs] Fix incorrect Pub/Sub example resulting in BadRequestException (#460)
[Docs] Fix incorrect Pub/Sub example resulting in BadRequestException (#460)


jdpedrie/google-cloud-php,pvm1987/google-cloud-php,googleapis/google-cloud-php,pvm1987/google-cloud-php,chingor13/google-cloud-php,googleapis/google-cloud-php,jdpedrie/google-cloud-php,jdpedrie/google-cloud-php,googleapis/google-cloud-php,chingor13/google-cloud-php,chingor13/google-cloud-php