chore: update helm docs and prepare release

Author: hardworker-bot

helm/cosmo/charts/router/README.md

@@ -1,6 +1,6 @@
 # router
 
-![Version: 0.15.0](https://img.shields.io/badge/Version-0.15.0-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 0.243.0](https://img.shields.io/badge/AppVersion-0.243.0-informational?style=flat-square)
+![Version: 0.15.1](https://img.shields.io/badge/Version-0.15.1-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 0.243.0](https://img.shields.io/badge/AppVersion-0.243.0-informational?style=flat-square)
 
 This is the official Helm Chart for the WunderGraph Cosmo Router.