chore: Update SECURITY.md (#746)

Author: sberesnevnr

SECURITY.md

@@ -1,19 +1,6 @@
 # Security Policy
 
-## Supported Versions
-
-Use this section to tell people about which versions of your project are
-currently being supported with security updates.
-
-| Version | Supported          |
-| ------- | ------------------ |
-| 4.0.x   | :white_check_mark: |
-| < 4.0   | :x:                |
-
 ## Reporting a Vulnerability
 
-Use this section to tell people how to report a vulnerability.
+Please report security vulnarabilities by opening an issue labeled `SECURITY` here - https://github.com/uiwjs/react-codemirror/issues.
 
-Tell them where to go, how often they can expect to get an update on a
-reported vulnerability, what to expect if the vulnerability is accepted or
-declined, etc.