Add security policy to repo (#827)

Author: snehankekre

SECURITY.md

@@ -0,0 +1,13 @@
+# Security Policy
+
+## Supported Versions
+
+| Version   | Supported |
+| --------- | --------- |
+| >= 1.11.1 | ✅        |
+
+</br>
+
+Please refer to the Snowflake [HackerOne program](https://hackerone.com/snowflake?type=team) for our security policies and for reporting any security vulnerabilities.
+
+For other security related questions and concerns, please contact the Snowflake security team at [email protected]