Adds a changelog entry

Signed-off-by: Darshit Chanpura <[email protected]>

README.md

@@ -25,7 +25,7 @@ A community repository for Helm Charts of OpenSearch Project.
 
 
 #### Breaking Change 
-Chart version 2.18.0 and OpenSearch version 2.12 and above require a custom strong password to be provided in order to setup demo admin user. Without this password the cluster would not spin up, unless demo config install is disabled.
+Chart version 2.18.0 and App Version OpenSearch version 2.12.0 and above require a custom strong password to be provided in order to setup demo admin user. Without this password the cluster would not spin up, unless demo config install is disabled.
 
 The custom admin password can be supplied by adding the environment variable `OPENSEARCH_INITIAL_ADMIN_PASSWORD` in the `value.yml`:
 ```

charts/opensearch/CHANGELOG.md

@@ -12,7 +12,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Removed
 ### Fixed
 ### Security
-
+---
+## [2.18.0]
+### Added
+### Breaking
+ - Requires an initial admin password to be setup. Refer this github issue: https://github.com/opensearch-project/security/issues/3622
+### Changed
+### Deprecated
+### Removed
+### Fixed
+### Security
 ---
 ## [2.17.2]
 ### Added