[DOCS] Typo introduced in docs about cross-cluster replication (CCR)

[bunste]

I guess this is just a small typo. On the page Set up a cluster for high availability it says:

CCR provides a way to automatically synchronize indices from a leader cluster to a follower cluster. This cluster could be in a different data center or even a different content from the leader cluster. If the primary cluster fails, the secondary cluster can take over.

I have bolded the relevant word in this paragraph. Before version 8.17 the word continent was used instead of content. Which also makes much more sense :)

[kingherc]

Closing here and copied into new issue elastic/docs-content#651