create: security.md (#776)

* create: security.md

* Update SECURITY.md

* Update README.md

* Rename SECURITY.md to .github/SECURITY.md

Co-authored-by: Dries Vints <dries@vints.io>

Author: HDVinnie

.github/SECURITY.md

@@ -0,0 +1,5 @@
+# Reporting a Vulnerability
+
+**PLEASE DON'T DISCLOSE SECURITY-RELATED ISSUES PUBLICLY.**
+
+If you discover any security related issues, please email hello@laravel.io instead of using the issue tracker.

README.md

@@ -127,7 +127,7 @@ Please read our [Code of Conduct](CODE_OF_CONDUCT.md) before contributing or eng
 
 ## Security Vulnerabilities
 
-If you discover a security vulnerability within Laravel.io, please send an email immediately to [security@laravel.io](mailto:security@laravel.io). **Do not create an issue for the vulnerability.**
+Please review [our security policy](.github/SECURITY.md) on how to report security vulnerabilities.
 
 ## License