fix linter issue (#4488)

helm-chart/README.md

@@ -135,4 +135,4 @@ Then - put your instance params to "external" field
 Just create file `values.override.yaml` and place your changes here, using same structure as in `values.yaml`.
 Then reference it in helm update/install command using `-f` flag
 ### Why you used external charts to provide redis and postgres?
-Because they definitely know what they do better then we are, so we are getting more quality and less support
\ No newline at end of file
+Because they definitely know what they do better then we are, so we are getting more quality and less support