[TD-5532] <docs>: fix Grafana plugin json file location.

documentation20/cn/09.connections/docs.md

@@ -64,7 +64,7 @@ sudo cp -rf /usr/local/taos/connector/grafanaplugin /var/lib/grafana/plugins/tde
 
 #### 导入 Dashboard
 
-在 Grafana 插件目录 /usr/local/taos/connector/grafana/tdengine/dashboard/ 下提供了一个 `tdengine-grafana.json` 可导入的 dashboard。
+在 Grafana 插件目录 /usr/local/taos/connector/grafanaplugin/dashboard 下提供了一个 `tdengine-grafana.json` 可导入的 dashboard。
 
 点击左侧 `Import` 按钮，并上传 `tdengine-grafana.json` 文件：
 

documentation20/en/09.connections/docs.md

@@ -6,7 +6,7 @@ TDengine can quickly integrate with [Grafana](https://www.grafana.com/), an open
 
 ### Install Grafana
 
-TDengine currently supports Grafana 5.2.4 and above. You can download and install the package from Grafana website according to the current operating system. The download address is as follows:
+TDengine currently supports Grafana 6.2 and above. You can download and install the package from Grafana website according to the current operating system. The download address is as follows:
 
 https://grafana.com/grafana/download.
 
@@ -64,7 +64,7 @@ According to the default prompt, query the average system memory usage at the sp
 
 #### Import Dashboard
 
-A `tdengine-grafana.json` importable dashboard is provided under the Grafana plug-in directory/usr/local/taos/connector/grafana/tdengine/dashboard/.
+A `tdengine-grafana.json` importable dashboard is provided under the Grafana plug-in directory `/usr/local/taos/connector/grafanaplugin/dashboard`.
 
 Click the `Import` button on the left panel and upload the  `tdengine-grafana.json` file: