Update readme (loki-stack)

production/helm/README.md

@@ -27,7 +27,7 @@ $ helm upgrade --install loki loki/loki-stack
 ### Deploy with custom config
 
 ```bash
-$ helm upgrade --install loki loki/loki --set "key1=val1,key2=val2,..."
+$ helm upgrade --install loki loki/loki-stack --set "key1=val1,key2=val2,..."
 ```
 
 ## Deploy Loki only
@@ -121,4 +121,4 @@ $ # update version loki/Chart.yaml
 $ # update version loki-stack/Chart.yaml
 ```
 
-You can use the `make helm-debug` to test and print out all chart templates. If you want to install helm (tiller) in your cluster use `make helm-install`, to install the current build in your Kubernetes cluster run `make helm-upgrade`.
\ No newline at end of file
+You can use the `make helm-debug` to test and print out all chart templates. If you want to install helm (tiller) in your cluster use `make helm-install`, to install the current build in your Kubernetes cluster run `make helm-upgrade`.