Repetitve doc links in jwt-claims sample README

[isudana]

Description:
This is originally reported by Jason De Silva at https://wso2.org/jira/projects/WMS/issues/WMS-89

In the sample [1] there are repetitive links to the same doc. Can we correct it to have only one link.

[1] https://github.com/wso2/msf4j/tree/master/samples/jwt-claims

Suggested Labels:
Type/Improvement
Priority/Normal

Related Issues:
https://wso2.org/jira/projects/WMS/issues/WMS-89