Update .NET tags EOL policy (#6157)

Co-authored-by: Matt Thalman <[email protected]>

Author: lbussell

documentation/supported-tags.md

@@ -235,11 +235,10 @@ For Windows, `amd64` is the only architecture supported and is excluded from the
 
 Each tag will be supported for the lifetime of the .NET and OS version referenced by the tag, unless further restricted according to [platform support policy](supported-platforms.md).
 
-When an OS version reaches End-of-Life (EOL), its tags will no longer be maintained.
+When a .NET version or an OS version reaches End-of-Life (EOL), its tags will no longer be supported.
+Unsupported tags and images can still be pulled, but they will no longer receive updates for any reason.
 
-When a .NET version reaches EOL, its tags will continue to be maintained (rebuilt for base image updates) until the next .NET servicing date (typically on "Patch Tuesday", the 2nd Tuesday of the month).
-
-Once a tag is no longer maintained, it will be considered unsupported, and will no longer be updated. Unsupported tags will continue to exist in the container registry to prevent breaking any references to it.
+See ["Is your image built from a supported .NET tag?"](vulnerability-reporting.md#c-is-your-image-built-from-a-supported-net-tag) for details on how to tell if a specific tag is supported.
 
 ## Policy Changes