fix version name

Author: Aleksey Penzin

charts/gateway-helm/Chart.yaml

@@ -3,7 +3,7 @@ name: gateway-helm
 description: The Helm chart for Envoy Gateway
 type: application
 
-version: v1.7.1
+version: 1.7.1
 appVersion: 1.7.1
 icon: https://raw.githubusercontent.com/envoyproxy/gateway/main/site/assets/icons/logo.svg