Update relay proxy helm README (#3279)

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Author: thomaspoignant

cmd/relayproxy/helm-charts/relay-proxy/README.md

@@ -1,6 +1,6 @@
 # relay-proxy
 
-![Version: 1.42.0](https://img.shields.io/badge/Version-1.42.0-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: v1.42.0](https://img.shields.io/badge/AppVersion-v1.42.0-informational?style=flat-square)
+![Version: 1.43.0](https://img.shields.io/badge/Version-1.43.0-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: v1.43.0](https://img.shields.io/badge/AppVersion-v1.43.0-informational?style=flat-square)
 
 A Helm chart to deploy go-feature-flag-relay proxy into Kubernetes