Rewrite security policy

.github/SECURITY.md

@@ -1,8 +1,19 @@
 # Security policy
+The security of Randomness is important to me.
+If you find a vulnerability in Randomness, please
+[report the vulnerability](https://github.com/FWDekker/mommy/security/advisories/new) as soon as possible.
+
+Please note that Randomness is distinct from IntelliJ and other IDEs developed by JetBrains.
+To report a vulnerability in IntelliJ or another JetBrains product, please
+[check JetBrains' security policy](https://www.jetbrains.com/privacy-security/).
+
 ## Supported versions
-Only the [latest version](https://github.com/FWDekker/intellij-randomness/releases/latest) is ever supported and
-supplied with security patches.
+Only the [latest version of Randomness](https://github.com/FWDekker/intellij-randomness/releases/latest) is ever
+supported and supplied with security patches.
 
 ## Reporting a vulnerability
-To report a security vulnerability, email `[email protected]` instead of using the issue tracker.
+To report a vulnerability in Randomness, please use
+[GitHub's vulnerability reporting feature](https://github.com/FWDekker/mommy/security/advisories/new).
 You will be contacted as soon as possible.
+You will be thanked publicly for reporting the vulnerability, unless you indicate that you prefer to be thanked
+anonymously.