[YUNIKORN-759] Fix the helm install command in README (#44)

diff --git a/helm-charts/yunikorn/README.md b/helm-charts/yunikorn/README.md
index 69d44b1..028dc07 100644
--- a/helm-charts/yunikorn/README.md
+++ b/helm-charts/yunikorn/README.md
@@ -52,7 +52,7 @@
 ```
 helm repo add yunikorn  https://apache.github.io/incubator-yunikorn-release
 helm repo update 
-helm install yunikorn/yunikorn
+helm install yunikorn yunikorn/yunikorn
 ```
 ## Configuration
 The following table lists the configurable parameters of the YuniKorn chart and their default values.