Update README

README.md

@@ -13,6 +13,7 @@ Once Helm is set up properly, add the repository as follows:
 
 ```console
 helm repo add joylive https://jd-opensource.github.io/joylive-helm-charts
+helm repo update
 ```
 
 You can then run `helm search repo joylive` to see the charts.

charts/joylive-injector/README-zh.md

@@ -20,6 +20,7 @@
 因证书签名已按照命名空间为`joylive`预生成，所以须指定安装到对应命名空间。 执行命令：
 ```bash
 helm repo add joylive https://jd-opensource.github.io/joylive-helm-charts
+helm repo update
 kubectl create namespace joylive
 helm install joylive-injector joylive/joylive-injector -n joylive
 ```

charts/joylive-injector/README.md

@@ -19,6 +19,7 @@ This program monitors the `CREATE`, `UPDATE`, `DELETE` events for `deployments`
 Since the certificate signature has been pre-generated according to the namespace `joylive`, it is necessary to specify installation to the corresponding namespace. Execute the command:
 ```bash
 helm repo add joylive https://jd-opensource.github.io/joylive-helm-charts
+helm repo update
 kubectl create namespace joylive
 helm install joylive-injector joylive/joylive-injector -n joylive
 ```