docs: include security.md (#1059)

cr: https://code.amazon.com/reviews/CR-144494220

Co-authored-by: Andrew Ge <[email protected]>

Author: denisquesada

SECURITY.md

@@ -0,0 +1,6 @@
+Reporting Security Issues
+-------------------------------------------------------------------------------------------------------------------------------------------------
+We take all security reports seriously. When we receive such reports, we will investigate and
+subsequently address any potential vulnerabilities as quickly as possible. If you discover a potential
+security issue in this project, please notify AWS/Amazon Security via our [vulnerability reporting page](http://aws.amazon.com/security/vulnerability-reporting/) or
+directly via email to [AWS Security](mailto:[email protected]). Please do not create a public GitHub issue in this project.