add badges to root readme

Author: tobiasehlert

README.md

@@ -1,5 +1,8 @@
 # TibiaData Helm Charts
 
+[![Release Status](https://github.com/TibiaData/tibiadata-helm-charts/actions/workflows/release.yaml/badge.svg?branch=main)](https://github.com/TibiaData/tibiadata-helm-charts/actions)
+[![GitHub license](https://img.shields.io/github/license/TibiaData/tibiadata-helm-charts)](https://github.com/TibiaData/tibiadata-helm-charts/blob/main/LICENSE)
+
 TibiaData Helm charts for deploying into Kubernetes.
 
 ## Usage
@@ -11,6 +14,7 @@ Once Helm is set up properly, add the repository as follows:
 
 ```console
 helm repo add tibiadata https://charts.tibiadata.com
+helm repo update
 ```
 
 You can then run `helm search repo tibiadata` to see the charts.