docs: update telegraf dashboard doc (#20227)

* docs: update telegraf dashboard doc

* change doc

docs/en/25-application/01-telegraf.md

@@ -67,7 +67,7 @@ sudo systemctl start telegraf
 
 Log in to the Grafana interface using a web browser at `IP:3000`, with the system's initial username and password being `admin/admin`.
 Click on the gear icon on the left and select `Plugins`, you should find the TDengine data source plugin icon.
-Click on the plus icon on the left and select `Import` to get the data from `https://github.com/taosdata/grafanaplugin/blob/master/examples/telegraf/grafana/dashboards/telegraf-dashboard-v0.1.0.json`, download the dashboard JSON file and import it. You will then see the dashboard in the following screen.
+Click on the plus icon on the left and select `Import` to get the data from `https://github.com/taosdata/grafanaplugin/blob/master/examples/telegraf/grafana/dashboards/telegraf-dashboard-v3.json` (for Tdengine 3.0. for TDengine 2.x, please use `telegraf-dashboard-v2.json`), download the dashboard JSON file and import it. You will then see the dashboard in the following screen.
 
 ![TDengine Database IT-DevOps-Solutions-telegraf-dashboard](./IT-DevOps-Solutions-telegraf-dashboard.webp)
 

docs/zh/25-application/01-telegraf.md

@@ -67,7 +67,7 @@ sudo systemctl start telegraf
 
 使用 Web 浏览器访问 `IP:3000` 登录 Grafana 界面，系统初始用户名密码为 admin/admin。
 点击左侧齿轮图标并选择 `Plugins`，应该可以找到 TDengine data source 插件图标。
-点击左侧加号图标并选择 `Import`，从 `https://github.com/taosdata/grafanaplugin/blob/master/examples/telegraf/grafana/dashboards/telegraf-dashboard-v0.1.0.json` 下载 dashboard JSON 文件后导入。之后可以看到如下界面的仪表盘：
+点击左侧加号图标并选择 `Import`，从 `https://github.com/taosdata/grafanaplugin/blob/master/examples/telegraf/grafana/dashboards/telegraf-dashboard-v3.json` (适配 TDengine 3.0, 如果使用 TDengine 2.x， 请下载 `telegraf-dashboard-v2.json`) 下载 dashboard JSON 文件后导入。之后可以看到如下界面的仪表盘：
 
 ![TDengine Database IT-DevOps-Solutions-telegraf-dashboard](./IT-DevOps-Solutions-telegraf-dashboard.webp)