fix an error in doc
fix an error in doc

Signed-off-by: stone-ch <b5d4a4f3df99303882e93f6d400d7a4293440280@163.com>
Change-Id: I8bde717defdf0467b3a5901049a9dcbb428d421a

manish-sethi/fabric-sidedb,binhn/fabric,muralisrini/fabric,hyperledger/fabric,muralisrini/fabric,jimthematrix/fabric,manish-sethi/fabric,manish-sethi/fabric-sidedb,stemlending/fabric,manish-sethi/fabric-sidedb,binhn/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric,muralisrini/fabric,binhn/fabric,manish-sethi/fabric-sidedb,jimthematrix/fabric,stemlending/fabric,manish-sethi/fabric-sidedb,hyperledger/fabric,stemlending/fabric,stemlending/fabric,manish-sethi/fabric-sidedb