fix (#1022)

Author: l-trotta

CONTRIBUTING.md

@@ -13,7 +13,7 @@ before we can accept pull requests from you.
 
 ### Prerequisites
 
-You need at least Java 11 to build the project, even though the code targets Java 8. The project is built with `Gradle`. You don't have to install it, and can use the provided `gradlew` that will install the required version if needed.
+You need at least Java 17 to build the project. The project is built with `Gradle`. You don't have to install it, and can use the provided `gradlew` that will install the required version if needed.
 
 Docker is used for some tests to spawn an Elasticsearch server.
 

docs/reference/setup/installation.md

@@ -7,7 +7,7 @@ mapped_pages:
 
 Requirements:
 
-* Java 8 or later.
+* Java 17 or later.
 * A JSON object mapping library to allow seamless integration of your application classes with the Elasticsearch API. The Java client has support for [Jackson](https://github.com/FasterXML/jackson) or a [JSON-B](https://github.com/eclipse-ee4j/jsonb-api) library like [Eclipse Yasson](https://github.com/eclipse-ee4j/yasson).
 
 Releases are hosted on [Maven Central](https://search.maven.org/search?q=g:co.elastic.clients). If you are looking for a SNAPSHOT version, the Elastic Maven Snapshot repository is available at [https://snapshots.elastic.co/maven/](https://snapshots.elastic.co/maven/).