Update SECURITY.md

SECURITY.md

@@ -5,12 +5,11 @@
 | Kentor.AuthServices (any version) | :x: | Migrate to latest Sustainsys.Saml2 1.x.y |
 | Sustainsys.Saml2 latest 1.x.y   | :white_check_mark: |
 | Sustainsys.Saml2 latest 2.x.y   | :white_check_mark: |
-| Sustainsys.Saml2 master branch, planned major version 3. | :x: | Wait for develpment to get ready. Or help out! |
+| Sustainsys.Saml2 develop branch, planned major version 3. | :x: | Wait for develpment to get ready. Or help out! |
 
 The 1.x and 2.x versions/branches only receives security updates or critical functionality patches, such as the SameSite cookie fix.
 
 The develop branch is for development of a new major version 3. It is work in progress and is not supported yet.
 
 ## Reporting a Vulnerability
-
-Mail any security issues to [email protected]. Never open an issue in the repo unless instructed so by mail. Do not submit a pull request.
+Report any security issues through GitHub's [vulnerability reporting](https://github.com/Sustainsys/Saml2/security/advisories/new). Never open a normal issue in the repo unless instructed so by mail. Do not submit any pull request.