upgrade grafana plugin version in document

docs/zh/20-third-party/01-grafana.mdx

@@ -77,7 +77,7 @@ sudo -u grafana grafana-cli plugins install tdengine-datasource
 或者从 [GitHub](https://github.com/taosdata/grafanaplugin/releases/tag/latest) 或 [Grafana](https://grafana.com/grafana/plugins/tdengine-datasource/?tab=installation) 下载 .zip 文件到本地并解压到 Grafana 插件目录。命令行下载示例如下：
 
 ```bash
-GF_VERSION=3.2.2
+GF_VERSION=3.2.7
 # from GitHub
 wget https://github.com/taosdata/grafanaplugin/releases/download/v$GF_VERSION/tdengine-datasource-$GF_VERSION.zip
 # from Grafana