docs: Update Maven badge

README.md

@@ -1,7 +1,7 @@
 # Vonage Server SDK for Java
 
 ![Java](https://img.shields.io/badge/java-8%2B-red)
-[![Maven Release](https://maven-badges.herokuapp.com/maven-central/com.vonage/server-sdk/badge.svg)](https://central.sonatype.com/artifact/com.vonage/server-sdk)
+[![Maven Central](https://img.shields.io/maven-central/v/com.vonage/server-sdk)](https://central.sonatype.com/artifact/com.vonage/server-sdk)
 [![Build Status](https://github.com/Vonage/vonage-java-sdk/actions/workflows/build.yml/badge.svg)](https://github.com/Vonage/vonage-java-sdk/actions/workflows/build.yml)
 [![codecov](https://codecov.io/gh/vonage/vonage-java-sdk/branch/main/graph/badge.svg)](https://codecov.io/gh/vonage/vonage-java-sdk)
 ![SLOC](https://sloc.xyz/github/vonage/vonage-java-sdk/)