Update Coordination.md claiming issue 21312
Update Coordination.md claiming issue 21312

JackyMai/elasticsearch,bawse/elasticsearch,JackyMai/elasticsearch,fernandozhu/elasticsearch,JackyMai/elasticsearch,LewayneNaidoo/elasticsearch,LewayneNaidoo/elasticsearch,JackyMai/elasticsearch,fernandozhu/elasticsearch,JackyMai/elasticsearch,C-Bish/elasticsearch,C-Bish/elasticsearch,fernandozhu/elasticsearch,fernandozhu/elasticsearch,bawse/elasticsearch,C-Bish/elasticsearch,bawse/elasticsearch,LewayneNaidoo/elasticsearch,bawse/elasticsearch,fernandozhu/elasticsearch,LewayneNaidoo/elasticsearch,LewayneNaidoo/elasticsearch,C-Bish/elasticsearch,C-Bish/elasticsearch,bawse/elasticsearch