docs: fix typo for CacheSessionPool config (#2716)
docs: fix typo for CacheSessionPool config (#2716)


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