HBASE-22873 Typo in block caching docs
HBASE-22873 Typo in block caching docs

Signed-off-by: Reid Chan <60b27648fd083973a62ead7708c08becc13de035@apache.org>
Apache9/hbase,Apache9/hbase,mahak/hbase,Apache9/hbase,apurtell/hbase,ndimiduk/hbase,ChinmaySKulkarni/hbase,ChinmaySKulkarni/hbase,francisliu/hbase,ndimiduk/hbase,francisliu/hbase,ChinmaySKulkarni/hbase,francisliu/hbase,Apache9/hbase,ChinmaySKulkarni/hbase,apurtell/hbase,apurtell/hbase,ndimiduk/hbase,mahak/hbase,apurtell/hbase,francisliu/hbase,apurtell/hbase,mahak/hbase,apurtell/hbase,apurtell/hbase,ChinmaySKulkarni/hbase,francisliu/hbase,Apache9/hbase,ndimiduk/hbase,francisliu/hbase,mahak/hbase,ChinmaySKulkarni/hbase,ndimiduk/hbase,Apache9/hbase,ndimiduk/hbase,mahak/hbase,mahak/hbase,ChinmaySKulkarni/hbase,apurtell/hbase,mahak/hbase,francisliu/hbase,Apache9/hbase,ndimiduk/hbase,apurtell/hbase,mahak/hbase,ChinmaySKulkarni/hbase,ndimiduk/hbase,francisliu/hbase,Apache9/hbase,apurtell/hbase,Apache9/hbase,ChinmaySKulkarni/hbase,mahak/hbase,Apache9/hbase,francisliu/hbase,ChinmaySKulkarni/hbase,ndimiduk/hbase,ndimiduk/hbase,francisliu/hbase,mahak/hbase