Bumps main to 8.9.0 (#1854)

Author: elasticmachine

.ci/test-matrix.yml

@@ -1,6 +1,6 @@
 ---
 STACK_VERSION:
-  - "8.8.0-SNAPSHOT"
+  - "8.9.0-SNAPSHOT"
 
 NODE_JS_VERSION:
   - 18

package.json

@@ -1,7 +1,7 @@
 {
   "name": "@elastic/elasticsearch",
-  "version": "8.8.0",
-  "versionCanary": "8.8.0-canary.0",
+  "version": "8.9.0",
+  "versionCanary": "8.9.0-canary.0",
   "description": "The official Elasticsearch client for Node.js",
   "main": "index.js",
   "types": "index.d.ts",
@@ -96,4 +96,4 @@
     "coverage": false,
     "check-coverage": false
   }
-}
+}