feat(changelog): update CHANGELOG for version 2.3.4

- Added Apache Kafka integration for real-time event streaming, including a new controller, router, and schema.
- Fixed MySQL schema issues related to default values and added missing relation fields in the Instance model.
- Introduced new environment variables for comprehensive Kafka configuration.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "evolution-api",
-  "version": "2.3.3",
+  "version": "2.3.4",
   "description": "Rest api for communication with WhatsApp",
   "main": "./dist/main.js",
   "type": "commonjs",