Don't mention Helm values.yaml in the release guide as it doesn't contain version details

Author: jbonofre

site/content/release-guide.md

@@ -126,7 +126,6 @@ and update the version in the Helm Chart in:
 
 * `helm/polaris/Chart.yaml`
 * `helm/polaris/README.md`
-* `helm/polaris/values.yaml`
 
 and commit/push the version bump: