Update changelog

Author: ynnt

Changelog.md

@@ -11,7 +11,7 @@ adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
    provisioners wich don't support fsGroup in security context (fixes #615)
  * Add `appSecretLabels`, `appSecretAnnotations`, `backupSecretLabels`, `backupSecretAnnotations` to provide 
    custom labels and annotations to created app and backup secrets
- * Add `serviceSpec` for MysqlCLuster
+ * Add `serviceSpec` for MysqlCluster CRD to provide the ability for additional service generation
 ### Changed
  * Allow setting pod security context when deploying with Helm
  * Use [distroless](https://github.com/GoogleContainerTools/distroless) as base image for orchestrator container