Update elasticsearch.md (#8059)

* Update elasticsearch.md

Clarified Elasticsearch documentation

* Update elasticsearch.md

removed "support for Elasticsearch 7.x" in documentation again.

* Update elasticsearch.md

added extended explanation regarding compatibility other ES 7.x versions

* Update src/guides/v2.4/install-gde/prereq/elasticsearch.md

Co-authored-by: Jeff Matthews <matthews.jeffery@gmail.com>

Co-authored-by: Jeff Matthews <matthews.jeffery@gmail.com>

Author: jonashrem

src/guides/v2.4/install-gde/prereq/elasticsearch.md

@@ -23,7 +23,9 @@ As of Magento 2.4, all installations must be configured to use [Elasticsearch][]
 
 ## Supported versions {#es-spt-versions}
 
-You must install and configure Elasticsearch 7.6.x before upgrading to Magento 2.4.0.
+You must install and configure Elasticsearch 7.6.x before upgrading to Magento 2.4.x.
+
+Magento 2.4.x is tested with Elasticsearch 7.6.x only. You can use other 7.x versions at your discretion, but we recommend using the tested version of Elasticsearch.
 
 {:.bs-callout-info}
 Magento does not support Elasticsearch 2.x, 5.x, and 6.x.
@@ -75,14 +77,14 @@ The tasks discussed in this section require the following:
 
 *  [Firewall and SELinux](#firewall-selinux)
 *  [Install the Java Software Development Kit (JDK)](#prereq-java)
-*  [Install Elasticsearch](#es-install-es6)
+*  [Install Elasticsearch](#es-install-es7)
 *  [Upgrading Elasticsearch](#es-upgrade6)
 
 {% include config/solr-elastic-selinux.md %}
 
 {% include config/install-java8.md %}
 
-### Install Elasticsearch  {#es-install-es6}
+### Install Elasticsearch  {#es-install-es7}
 
 Follow [Installing Elasticsearch][] for your platform-specific steps.