Minor bug on the Magma storage engine page

One of the bullets on the following link should be reworded:

https://docs-staging.couchbase.com/server/7.1/learn/buckets-memory-and-storage/storage-engines.html#when-should-you-use-magma

This is the current sentence:

• you need to store large amounts of data in a single node (> 5 TB) using lowest amount of memory

We should change it to:

• you need to store and access large amounts of data (several TBs) using lowest amount of memory