Update upgrade.md
Update upgrade.md
trandangtri/ElasticsearchBundle,murnieza/ElasticsearchBundle,tautrimas/ElasticsearchBundle,asev/ElasticsearchBundle,ongr-io/ElasticsearchBundle,saimaz/ElasticsearchBundle,martiis/ElasticsearchBundle,saimaz/ElasticsearchBundle,martiis/ElasticsearchBundle,tautrimas/ElasticsearchBundle,trandangtri/ElasticsearchBundle,asev/ElasticsearchBundle,murnieza/ElasticsearchBundle