ElasticSearch/ElasticSearch release notes

https://github.com/elastic/elasticsearch/releases and https://www.elastic.co/guide/en/elasticsearch/reference/7.4/es-release-notes.html


 * 7.5.0 https://www.elastic.co/guide/en/elasticsearch/reference/7.5/release-notes-7.5.0.html


 * 7.4.0 https://www.elastic.co/guide/en/elasticsearch/reference/7.4/release-notes-7.4.0.html
 * 7.4.1 https://www.elastic.co/guide/en/elasticsearch/reference/7.4/release-notes-7.4.1.html