Use gav=true for the maven central redirect

This functionality has now been fixed to match the gav=true parameter
for the badge.

README.md

@@ -48,7 +48,7 @@ Apache Commons Codec
 
 [![Build Status](https://travis-ci.org/apache/commons-codec.svg)](https://travis-ci.org/apache/commons-codec)
 [![Coverage Status](https://coveralls.io/repos/apache/commons-codec/badge.svg?branch=master)](https://coveralls.io/github/apache/commons-codec?branch=master)
-[![Maven Central](https://maven-badges.herokuapp.com/maven-central/commons-codec/commons-codec/badge.svg?gav=true)](https://search.maven.org/artifact/commons-codec/commons-codec/1.14/jar)
+[![Maven Central](https://maven-badges.herokuapp.com/maven-central/commons-codec/commons-codec/badge.svg?gav=true)](https://maven-badges.herokuapp.com/maven-central/commons-codec/commons-codec/?gav=true)
 [![Javadocs](https://javadoc.io/badge/commons-codec/commons-codec/1.14.svg)](https://javadoc.io/doc/commons-codec/commons-codec/1.14)
 
 The Apache Commons Codec package contains simple encoder and decoders for