Prep 8.12.2 for release (#2142)

* Backport changelog for 8.12.1

* Add changelog for 8.12.2

docs/changelog.asciidoc

@@ -1,6 +1,17 @@
 [[changelog-client]]
 == Release notes
 
+[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
 

package.json

@@ -1,7 +1,7 @@
 {
   "name": "@elastic/elasticsearch",
-  "version": "8.12.1",
-  "versionCanary": "8.12.1-canary.0",
+  "version": "8.12.2",
+  "versionCanary": "8.12.2-canary.0",
   "description": "The official Elasticsearch client for Node.js",
   "main": "index.js",
   "types": "index.d.ts",
@@ -83,7 +83,7 @@
     "zx": "^7.2.2"
   },
   "dependencies": {
-    "@elastic/transport": "^8.4.0",
+    "@elastic/transport": "^8.4.1",
     "tslib": "^2.4.0"
   },
   "tap": {
@@ -93,4 +93,4 @@
     "coverage": false,
     "check-coverage": false
   }
-}
+}