docs: edgefs quickstart mention replication count requirements
docs: edgefs quickstart mention replication count requirements

Signed-off-by: Zohar Mamedov <53959c55ad55d829abd3dce67a85217fe32f151a@gmail.com>

rook/rook,rook/nfs,rook/rook,rook/nfs,rook/nfs,rook/rook,rook/rook,rook/rook