feat: 更新说明

README.md

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+# JumpServer Kubernetes Helm Chart
+
+[![Release Charts](https://github.com/jumpserver/helm-charts/actions/workflows/release.yml/badge.svg)](https://github.com/jumpserver/helm-charts/actions/workflows/release.yml)
+
+## Usage
+
+[Helm](https://helm.sh) must be installed to use the charts.
+Please refer to Helm's [documentation](https://helm.sh/docs/) to get started.
+
+Once Helm is set up properly, add the repo as follows:
+
+```console
+helm repo add jumpserver https://jumpserver.github.io/helm-charts
+helm repo list
+```
+
+You can then run `helm search repo jumpserver` to see the charts.
+
+<!--
+## License
+
+[Apache 2.0 License](https://github.com/jumpserver/helm-charts/blob/main/LICENSE).  
+
+-->
+
+## Documentation
+
+[installer](https://docs.jumpserver.org/zh/master/install/setup_by_fast/)