[DOCS] Updates docs for 9.0.2, headers

Author: picandocodigo

CHANGELOG.md

@@ -1,12 +1,16 @@
 **See the full release notes on the official documentation website: https://www.elastic.co/docs/release-notes/elasticsearch/clients/ruby**
 
+# 9.0.2
+
+- Udpates setting 'Accept' and 'Content-Type' headers as to not duplicate or overwrite user set headers.
+
 # 9.0.1
 
 - The request headers were updated for Elasticsearch v9: `compatible-with=9` [#2660](https://github.com/elastic/elasticsearch-ruby/pull/2660).
 
 # 9.0.0
 
-Ruby 3.2 and up are tested and supported for 9.0. Older versions of Ruby have reached their end of life. We follow Ruby’s own maintenance policy and officially support all currently maintained versions per [Ruby Maintenance Branches](https://www.ruby-lang.org/en/downloads/branches/). The required Ruby version is set to `2.6` to keep compatibility with JRuby 9.3. However, we only test the code against currently supported Ruby versions.
+Ruby 3.2 and up are tested and supported for 9.0. Older versions of Ruby have reached their end of life. We follow Ruby’s own maintenance policy and officially support all currently maintained versions per [Ruby Maintenance Branches](https://www.ruby-lang.org/en/downloads/branches/). The required Ruby version is set to `2.6` to keep compatiblity wit JRuby 9.3. However, we only test the code against currently supported Ruby versions.
 
 ## Gem
 
@@ -53,7 +57,7 @@ client.scroll(body: { scroll_id: scroll_id })
 
 ## Testing
 
-The gem `elasticsearch-api` migrated away from the Elasticsearch REST API tests and test runner in CI. We now run the [Elasticsearch Client tests](https://github.com/elastic/elasticsearch-clients-tests/) with the [Elasticsearch Tests Runner](https://github.com/elastic/es-test-runner-ruby). This gives us more control on what we're testing and makes the Buildkite build faster in pull requests and scheduled builds.
+The gem `elasticsearch-api` migrated away from the Elasticsearch REST API tests and test runner in CI. We now run the [Elasticsearch Client tests](https://github.com/elastic/elasticsearch-clients-tests/) with the [Elasticsearch Tests Runner](https://github.com/elastic/es-test-runner-ruby). This gives us more control on what we're testing and makes the Buildkite build way faster in Pull Requests and scheduled builds.
 
 ## Fixes
 

docs/release-notes/breaking-changes.md

@@ -3,6 +3,7 @@ navigation_title: "Breaking changes"
 ---
 
 # Elasticsearch Ruby Client breaking changes [elasticsearch-ruby-client-breaking-changes]
+
 Breaking changes can impact your Elastic applications, potentially disrupting normal operations. Before you upgrade, carefully review the Elasticsearch Ruby Client breaking changes and take the necessary steps to mitigate any issues. To learn how to upgrade, check [Upgrade](docs-content://deploy-manage/upgrade.md).
 
 % ## Next version [elasticsearch-ruby-client-nextversion-breaking-changes]
@@ -14,6 +15,10 @@ Breaking changes can impact your Elastic applications, potentially disrupting no
 % **Action**<br> Steps for mitigating deprecation impact.
 % ::::
 
+## 9.0.1 [elasticsearch-ruby-client-9.0.1-breaking-changes]
+
+The client sends the `Accept` and `Content-Type` headers to Elasticsearch with the value 'application/vnd.elasticsearch+json; compatible-with=9' to ensure compatibility with Elastic Stack 9.0. You can [customize the HTTP headers](/reference/advanced-config.md#custom-http-headers) when instantiating the client or per request. Note that a compatible version is required on both `Content-Type` and `Accept` headers.
+
 ## 9.0.0 [elasticsearch-ruby-client-900-breaking-changes]
 
 ### Scroll APIs need to send scroll_id in request body

docs/release-notes/index.md

@@ -20,6 +20,10 @@ To check for security updates, go to [Security announcements for the Elastic sta
 % ### Fixes [elasticsearch-ruby-client-next-fixes]
 % *
 
+## 9.0.2 [elasticsearch-ruby-client-9.0.2-release-notes]
+
+- Udpates setting `Accept` and `Content-Type` headers as to not duplicate or overwrite user set headers.
+
 ## 9.0.1 [elasticsearch-ruby-client-9.0.1-release-notes]
 
 ### Fixes [elasticsearch-ruby-client-9.0.1-fixes]