Update how-to-upgrade.md (#4935)

* Update how-to-upgrade.md

add note about using the correct version while upgrading

* Update docs/send-data/kubernetes/v4/how-to-upgrade.md

---------

Co-authored-by: John Pipkin (Sumo Logic) <[email protected]>

Author: wjakelee

docs/send-data/kubernetes/v4/how-to-upgrade.md

@@ -174,6 +174,9 @@ Once you've taken care of any manual steps necessary for your configuration, run
 ```bash
 helm upgrade --namespace "${NAMESPACE}" "${HELM_RELEASE_NAME}" sumologic/sumologic --version=4.0.0 -f new-values.yaml
 ```
+:::note
+Make sure to replace `--version=4.0.0` with the version of the helm chart you prefer to use. The latest release can be found in our [Sumo Logic Kubernetes Collection GitHub Repository](https://github.com/SumoLogic/sumologic-kubernetes-collection/releases).
+:::
 
 After you're done, please review the [full list of changes](full-list-of-changes.md), as some of them may impact you even if they do not require additional action.