fix observability document (#369)

docs/platform-engineers/system-operation/observability.md

@@ -118,7 +118,7 @@ cloud provider's Kubernetes clusters, and the domain rules.
 ### Get an account for the monitoring dashboard
 
 ```shell
-$ kubectl get secret grafana -o jsonpath="{.data.admin-password}" -n observability | base64 --decode ; echo
+$ kubectl get secret grafana -o jsonpath="{.data.admin-password}" -n vela-system | base64 --decode ; echo
 <password printed here>
 ```
 

i18n/zh/docusaurus-plugin-content-docs/current/platform-engineers/system-operation/observability.md

@@ -110,7 +110,7 @@ Grafana 的域名，可以使用你自定义的域名，也可以使用 ACK 提
 ### 获取访问监控控制台的账号
 
 ```shell
-$ kubectl get secret grafana -o jsonpath="{.data.admin-password}" -n observability | base64 --decode ; echo
+$ kubectl get secret grafana -o jsonpath="{.data.admin-password}" -n vela-system | base64 --decode ; echo
 <密码显示在这里>
 ```
 

i18n/zh/docusaurus-plugin-content-docs/version-v1.1/platform-engineers/system-operation/observability.md

@@ -110,7 +110,7 @@ Grafana 的域名，可以使用你自定义的域名，也可以使用 ACK 提
 ### 获取访问监控控制台的账号
 
 ```shell
-$ kubectl get secret grafana -o jsonpath="{.data.admin-password}" -n observability | base64 --decode ; echo
+$ kubectl get secret grafana -o jsonpath="{.data.admin-password}" -n vela-system | base64 --decode ; echo
 <密码显示在这里>
 ```
 

versioned_docs/version-v1.1/platform-engineers/system-operation/observability.md

@@ -118,7 +118,7 @@ cloud provider's Kubernetes clusters, and the domain rules.
 ### Get an account for the monitoring dashboard
 
 ```shell
-$ kubectl get secret grafana -o jsonpath="{.data.admin-password}" -n observability | base64 --decode ; echo
+$ kubectl get secret grafana -o jsonpath="{.data.admin-password}" -n vela-system | base64 --decode ; echo
 <password printed here>
 ```