README.md fixes (#130)
README.md fixes (#130)

* Close code-block in GKE notes

Signed-off-by: Paul "Hampy" Hampson <52eeb6bd41a82243e99298feec1558d155d34c09@wargaming.net>

* Put the ASCII diagram in a code block

Signed-off-by: Paul "Hampy" Hampson <52eeb6bd41a82243e99298feec1558d155d34c09@wargaming.net>

* Fix markdown of Zookeeper YAML Exporter notes

Signed-off-by: Paul "Hampy" Hampson <52eeb6bd41a82243e99298feec1558d155d34c09@wargaming.net>

pravega/zookeeper-operator,pravega/zookeeper-operator,pravega/zookeeper-operator