[Backport 8.13] Update changelog for 8.13 (#2168)

docs/changelog.asciidoc

@@ -1,11 +1,53 @@
 [[changelog-client]]
 == Release notes
 
+[discrete]
+=== 8.13.0
+
+[discrete]
+==== Features
+
+[discrete]
+===== Support for Elasticsearch `v8.13.0`
+
+You can find all the API changes
+https://www.elastic.co/guide/en/elasticsearch/reference/8.13/release-notes-8.13.0.html[here].
+
+[discrete]
+==== Fixes
+
+[discrete]
+===== Ensure new connections inherit client's set defaults https://github.com/elastic/elasticsearch-js/pull/2159[#2159]
+
+When instantiating a client, any connection-related defaults (e.g. `requestTimeout`) set on that client instance would not be inherited by nodes if they were entered as strings rather than a `ConnectionOptions` object.
+
+[discrete]
+=== 8.12.2
+
+[discrete]
+==== Fixes
+
+[discrete]
+===== Upgrade transport to 8.4.1 https://github.com/elastic/elasticsearch-js/pull/2137[#2137]
+
+Upgrades `@elastic/transport` to 8.4.1 to resolve https://github.com/elastic/elastic-transport-js/pull/83[a bug] where arrays in error diagnostics were unintentionally transformed into objects.
+
+[discrete]
+=== 8.12.1
+
+[discrete]
+==== Fixes
+
+[discrete]
+===== Fix hang in bulk helper semaphore https://github.com/elastic/elasticsearch-js/pull/2027[#2027]
+
+The failing state could be reached when a server's response times are slower than flushInterval.
+
 [discrete]
 === 8.12.0
 
 [discrete]
-=== Features
+==== Features
 
 [discrete]
 ===== Support for Elasticsearch `v8.12.0`
@@ -17,7 +59,7 @@ https://www.elastic.co/guide/en/elasticsearch/reference/8.12/release-notes-8.12.
 === 8.11.0
 
 [discrete]
-=== Features
+==== Features
 
 [discrete]
 ===== Support for Elasticsearch `v8.11.0`
@@ -36,7 +78,7 @@ See <<redaction>> for more information.
 === 8.10.0
 
 [discrete]
-=== Features
+==== Features
 
 [discrete]
 ===== Support for Elasticsearch `v8.10.0`