conf: update description of `reversed_reads_auto_bypass_cache` in scylla.yaml
conf: update description of `reversed_reads_auto_bypass_cache` in scylla.yaml

Message-Id: <779485d7f4f79ada98a5d3ad9349642b3c5083a5@scylladb.com>

scylladb/scylla,scylladb/scylla,scylladb/scylla,scylladb/scylla