docs: Issue on page Raft Consensus Algorithm in ScyllaDB

[kbr-scylla]

I would like to report an issue on page https://opensource.docs.scylladb.com/architecture/raft

Problem

This part:

A network partition may lead to a split-brain case, where each subset of nodes has a different version of the schema.

    With Raft, after a network split, the majority of the cluster can continue performing schema changes, while the minority needs to wait until it can rejoin the majority. Data manipulation statements on the minority can continue unaffected, provided the [quorum requirement](http://previews.docs.scylladb.com/scylladb/18689/architecture/raft/#raft-quorum-requirement) is satisfied.

1. Data manipulation statements have nothing to do with Raft quorum requirement
2. which means that this paragraph is self-contradictory. It basically says "data manipulation statements on the minority can continue unaffected, provided it forms a majority". Wut?

Suggest a fix

Remove the "provided" part.