Upload required SECURITY.md file for compliance

Author: sfdc-ospo-bot

SECURITY.md

@@ -4,4 +4,4 @@ Please report any security issue to [https://www.sfdc.co/SubmitVuln](https://www
 as soon as it is discovered. This library limits its runtime dependencies in
 order to reduce the total cost of ownership as much as can be, but all consumers
 should remain vigilant and have their security stakeholders review all third-party
-products (3PP) like this one and their dependencies.
+products (3PP) like this one and their dependencies.