Use correct security email address (#934)

Not sure how this happened but the DRF security email address was used instead of our newly created one.

Co-authored-by: Alan Crosswell <alan@columbia.edu>

Author: sliverc

SECURITY.md

@@ -4,6 +4,6 @@
 
 If you believe you've found something in Django REST Framework JSON API which has security implications, please **do not raise the issue in a public forum**.
 
-Send a description of the issue via email to [rest-framework-security@googlegroups.com][security-mail]. The project maintainers will then work with you to resolve any issues where required, prior to any public disclosure.
+Send a description of the issue via email to [rest-framework-jsonapi-security@googlegroups.com][security-mail]. The project maintainers will then work with you to resolve any issues where required, prior to any public disclosure.
 
-[security-mail]: mailto:rest-framework-security@googlegroups.com
+[security-mail]: mailto:rest-framework-jsonapi-security@googlegroups.com