[FAB-11313] Rewrite glossary anchor peer definition
[FAB-11313] Rewrite glossary anchor peer definition

The current anchor peer definition in the glossary is misleading
and makes readers deduce that anchor peers are a gateway through
which peers communicate.

Change-Id: I05b80d133f860467fe6fc909f57c70072b11402f
Signed-off-by: yacovm <632344b5da9bd743456189af4db4b56472defb8c@il.ibm.com>

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