Revise security policy details and reporting process (#121313)

Removed second mention of email, updated link titles, edited follow-up
process.

---------

Co-authored-by: Alexander Köplinger <[email protected]>
Co-authored-by: Jeremy Barton <[email protected]>
Co-authored-by: Copilot <[email protected]>

Author: 4 people

SECURITY.md

@@ -2,14 +2,17 @@
 
 ## Supported Versions
 
-The .NET Core and ASP.NET Core support policy, including supported versions can be found at the [.NET Core Support Policy Page](https://dotnet.microsoft.com/platform/support/policy/dotnet-core).
+The .NET, .NET Core and ASP.NET Core support policy, including supported versions can be found at the [.NET and .NET Core Support Policy Page](https://dotnet.microsoft.com/platform/support/policy/dotnet-core).
 
 ## Reporting a Vulnerability
 
+**Please do not open issues on GitHub for anything you think might have a security implication.**
+
 Security issues and bugs should be reported privately to the Microsoft Security Response Center (MSRC), via the [MSRC Researcher Portal](https://msrc.microsoft.com/report/vulnerability/new).
-You should receive a response within 24 hours. If for some reason you do not, please follow up via email to ensure we received your
-original message. Further information can be found in the [MSRC Report an Issue FAQ](https://www.microsoft.com/en-us/msrc/faqs-report-an-issue).
 
-Reports via MSRC may qualify for the .NET Core Bug Bounty. Details of the .NET Core Bug Bounty including terms and conditions are at [https://aka.ms/corebounty](https://aka.ms/corebounty).
+You should receive a response within 24 hours. If for some reason you do not, please follow up via the [MSRC Researcher Portal](https://msrc.microsoft.com/report/vulnerability/), using the Message functionality found at the bottom of the Activity tab on your vulnerability report.
+
+Further information can be found in the MSRC [Report an issue and submission guidelines](https://www.microsoft.com/en-us/msrc/faqs-report-an-issue).
+
+Reports via MSRC may qualify for the Microsoft .NET Bug Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at [https://aka.ms/corebounty](https://aka.ms/corebounty).
 
-Please do not open issues for anything you think might have a security implication.