update documentation with release 2.7.0
update documentation with release 2.7.0

jainishshah17/elasticsearch-cloud-aws,schonfeld/elasticsearch-cloud-aws,denzuko/elasticsearch-cloud-aws,crate/elasticsearch-cloud-aws,jainishshah17/elasticsearch-cloud-aws,lusid/elasticsearch-cloud-aws,crate/elasticsearch-cloud-aws,Fsero/elasticsearch-cloud-aws,kenden/elasticsearch-cloud-aws,kenden/elasticsearch-cloud-aws,Fsero/elasticsearch-cloud-aws,denzuko/elasticsearch-cloud-aws,schonfeld/elasticsearch-cloud-aws,lusid/elasticsearch-cloud-aws