Update README.md

Author: markxnelson

site/README.md

@@ -17,6 +17,6 @@ If you wish to view documentation for an older version, please see:
 * [Version 2.2.0](https://oracle.github.io/weblogic-kubernetes-operator/2.2.0)
 * [Version 2.2.1](https://oracle.github.io/weblogic-kubernetes-operator/2.2.1)
 * [Version 2.3.0](https://oracle.github.io/weblogic-kubernetes-operator/2.3.0)
-* [Version 2.4.0](https://oracle.github.io/weblogic-kubernetes-operator/2.4.0)
+* [Version 2.4.0](https://oracle.github.io/weblogic-kubernetes-operator/2.4.0/)
 
 For a guide to the operator project, refer to this [README](../README.md).