Update CHANGELOG.md

Update CHANGELOG.md for adding pull request #1646

Author: efazenda

CHANGELOG.md

@@ -7,6 +7,7 @@
 - [MicrosoftPowerAutomate] Add support for 'ms_power_automate_webhook_url_from_field' option to dynamically select the webhook URL from the match. - [#1623](https://github.com/jertel/elastalert2/pull/1623) - @aizerin
 - Add Webex Incoming Webhook alerter - [#1635](https://github.com/jertel/elastalert2/pull/1635) - @dennis-trapp
 - Support jinja2 templates in `alertmanager_labels` and `alertmanager_annotations` - [#1642](https://github.com/jertel/elastalert2/pull/1642) - @tgxworld
+- [Helm] Add support of update strategy in the deployment [#1642](https://github.com/jertel/elastalert2/pull/1646) - @efazenda
 
 ## Other changes
 - Fix `schema.yaml` to support Kibana 8.17 - [#1631](https://github.com/jertel/elastalert2/pull/1631) - @vpiserchia