Update SECURITY.md (#207)

Author: oxisto

SECURITY.md

@@ -6,7 +6,7 @@ As of February 2022 (and until this document is updated), the latest version `v4
 
 ## Reporting a Vulnerability
 
-If you think you found a vulnerability, and even if you are not sure, please report it to [@mfridman](http://github.com/mfridman) or one of the other [golang-jwt maintainers](https://github.com/orgs/golang-jwt/people). Please try be explicit, describe steps to reproduce the security issue with code example(s).
+If you think you found a vulnerability, and even if you are not sure, please report it to jwt-go-security@googlegroups.com or one of the other [golang-jwt maintainers](https://github.com/orgs/golang-jwt/people). Please try be explicit, describe steps to reproduce the security issue with code example(s).
 
 You will receive a response within a timely manner. If the issue is confirmed, we will do our best to release a patch as soon as possible given the complexity of the problem.