Typo in the Security Policy URL

Author: heliocola

.github/security.md

@@ -3,10 +3,10 @@
 ## Reporting a Vulnerability
 
 **Do not open up a GitHub issue if the bug is a security vulnerability in Rails**.
-Instead, refer to our [security policy](https://rubyonrails.org/security/).
+Instead, refer to our [security policy](https://rubyonrails.org/security).
 
 ## Supported Versions
 
 Security backports are provided for some previous release series. For details
 of which release series are currently receiving security backports see our
-[security policy](https://rubyonrails.org/security/).
+[security policy](https://rubyonrails.org/security).