[opencloud] opencloud.storage.posixfs.idCacheStore suggests support where docs say it doesn't exist

[sdwilsh]

In the opencloud chart, the opencloud.storage.posixfs.idCacheStore says this in a comment:

The type of the cache store, supported values are: 'memory', 'redis-sentinel', 'nats-js-kv' (default), 'noop'

However, the OpenCloud documentation says that STORAGE_USERS_ID_CACHE_STORE needs to be set to nats-js-kv.